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Mathematics Questions and Answers December 01, 2021

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Given a sample size of 25, a standard deviation of 2.9, and a sample average of 21.92, a 99% prediction interval would be between

Answer all questions. Section A: Homework 1) Determine which of the following is an example of descriptive statistics and which is an example of inferential statistics. a) The average height of all faculty at MCCC is 5 feet 11 inches. b) The average 1Q of a random sample of 100 students at MCCC is 105. Therefore, the average IQ of all MCCC
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Question:Use the following to answer the question with solution 60% of those who take a certification exam pass it. Assume binomial distribution applies. 10 people have registered to take the exam in June. 1)What is the probability that exactly 4 of them will pass the test? A.0.0000 B.0.1115 C.0.2501 D.0.1662 2)What is the probability that more

I need answer for question B: Thank you. File size (MB) Time (sec) 65 24.9 88 31.5 21 11.3 26 13.4 95 35.7 93 31.4 81 30.5 32 13.6 76 27.3 60 24.2 85 33.5 37 18.6 93 32.6 82 29.5 74 26.4 50 21.4 29 12.1 52 21.1 92 34.9 87 32.3 88 28.8 22 11.5 76 30.8 64 25.5 62 24.8 41 16.6 81 29.5 70 27.2 36 16.2 92 29.7 A company ran tests of its current
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see if there is an association between year and age for the poisonings at the .05 level Age 2018 2019 2020 0-5 76 68 81 6-19 18 17 29 20-59 27 28 45 60 93 85 220 B) Are there any really unusual deviations from expected values. C) Within each age group, 0-5, 6-59 (put two 6-19 and 20-59 together to get enough data), and 60 and up, run the Poisson

The magnitude of each outlier can be calculated by taking the difference between the observation and the mean and dividing by the coefficient of variation

12. If the factor identified in the previous question was statistically significant, would you conduct a post hoc analysis? Why or why not (i.e. state the degrees of freedom). If you would conduct one, which post hoc test would be most appropriate and why

4:18. Because of the importance of getting the reserves correct on the Little Yellow Jacket 6-1 your company has decided to shut in the well periodically and estimate average reservoir pressure. The following table contains the measurements. The well has not been returned to production after the last shut in while they wait for your latest

explicanel significado de variacion y apoya con un ejemplo

8:24 al 56 Unit 8 Section 10.2: Linear Correlation Assessment Score: 12.95/18 16/18 answered Progress saved Done Vie@ : X Question 2 v & 0/1pt O3 @ Details Score on last try: O of 1 pts. See Details for more. > Next question You can retry this question below Here is a bivariate data set. Find the correlation coefficient and report it accurate to
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How many ways can at least teo people be selected from a group of ten people? A) 2 10 - 10 C 0 - 10 C 1 B) 2 10 - 1 C) 10 C 2 + 10 C 3 + . . . + 10 C 10 D) Both A and C

solve this question 1 1 1) What can be said about a sample of observations with zero standard deviation? :1 2) Compare the following measures of dispersion: standard deviation, variance, and range. What are the benefits and disadvantages of each measure? FWSh att nut of 3) Explain each of the following types of cause and effect Illustrate with an
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2.73 Let X = the time between the jobs arriving at a workstation. Assume that X is exponential with a mean of 10 minutes. (a) Find an expression for the pth quantile and use it to find the median and the 75th percentile of the distribution of time between job arrivals. (b) What is the probability that no jobs arrive in a 15-minute interval
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Complete steps 2 through 4 of the hypotheses test for the correlation coefficient. The hypotheses for step 1 are provided. Give the value of p rounded to the nearest ten-thousandth (to four decimal places). You can type H0 as Ho. H0: = 0 (not linear) H1: 0 (linear) x = 68, 60, 94, 94, 83, 76 y= 54, 65, 86, 71, 73, 67

Suppose that you randomly selected 22 adults. If 24% of the population smoke, a) Using the Range Rule of Thumb, what is the minimum number of usual smokers we can expect to get out of 22 adults? .4464 X 1.2736051118243 Note: Round all answers to two decimal places. b) Using the Range Rule of Thumb, what is the maximum number of usual smokers we
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What steps could you take to test if something you are claiming is biased? Multiple choice question. Compare what you are saying to your past experiences and assume others have had similar experiences Examine what you are saying and determine where you got the information; determine if the source is reliable and tested Interpret what you are

Hello, I need help with how to find the following answers. Thanks! Exhibit 5-1 A stockbroker has kept a daily record of the value of a particular stock over the years and finds that prices of the stock form a normal distribution with a mean of $8.52 with a standard deviation of $2.38. 1.Refer to Exhibit 5-1. The percentile rank of a price of

#FrequencyDistribution #StatisticsAndProbability #MATHh An employee of the personnel department made a research of the number of absences made by 50 employees of a large company in one year. The following are the results of his survey: 10 15 12 19 12 16 11 11 13 5 18 14 3 12 11 12 12 13 15 16 21 12 18 10 2 9 10 11 13 5 17 11 15 16 18 14 13 15 a.
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Suppose a certain city's average monthly temperatures are 40, 53, 65, 75, 71, 80, 86, 92, 96, 90, 73, and 59 degrees. a. Find the range. b. Find the sample standard deviation. . . . a. The range is . (Simplify your answer.)
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Please help having a hard time with this. A publisher reports that 43 % of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 100 found that 35 % of the readers owned a laptop. Find the value of the test statistic. Round your answer to
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In general, in mail survey, the longer a potential respondent delays replying: Question 74 options: a) the less valid their response will be b) the more likely they will respond c) the less likely they will respond d) the more valid their response will be because they are taking their time completing the survey

A car shop records the number of cars serviced by a mechanic each day over a period of a few weeks. The mean number of cars serviced is 13 , and the standard deviation is 2 . If only 6 cars were serviced on a particularly slow day, which of the following statements is true? Select the correct answer below: The number of cars serviced on the slow

True or false? The standard deviation is typically smaller than the sum of squares. a. true b. false

How many people are in the California Executive branch? Group of answer choices 5 1 20 (8 + 12) 2

Answer each question in full detail and cite all sources. Utilizing a public high school in NYC incorporating the following: 1, Give examples of sampling generalization from the school? 2, What are the basic steps to be used in inferential conclusions? 3, How would you interpret the school's student retention rating statistical analysis/results

Find the critical value or values of 2 based on the given information. H1: <0.14 n=23 =0.10 Part 1 A. 14.042 B. 30.813 C. 30.813 D. 14.848

People in the aerospace industry conducted a pilot study to determine the relationship between the weight and cost of a major object being sent into space. Determine the number of observations needed to be 96% confident thatthe estimate of the averagecost is within$8 of the overall mean cost. Note: Assume that the pilot study standard deviation is
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Use the quiz score information below to find the relative frequency, cumulative frequency, and cumulative percentile, then answer the next four questions. Score Frequency. Relative Frequency. Cumulative Frequency. Cumulative Percentage 10 9 3 8 - - N
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Which of the following techniques are used to collect qualitative data? Numerical tables Inferential statistics Statistical Package for the Social Science (SPSS) software Video recordings

In the computation for the third tab labeled regression, after performing the appropriate test, it should be concluded that approximately 47.88% of the variation in cholesterol is explained by the independent variables

A random number generator will produce any number between 2 and 8. The density curve of the outcomes in this situation will have a constant height. Find P(3.5

In a standard normal distribution, what is the percentage of scores between a z score of -2 and a z score of +1.75

You want to select 100 students from a school. You assign a number to every student in the school. Then use a random number generator and select 100. What type of sampling method is this? Group of answer choices Stratified random sampling Simple random sampling Systematic sampling Cluster sampling

It snows once every 20 days when it snows glaciers have a 24% chance to grow when it doesn't snow, glaciers have a 7% chance to grow. what is the probability its snowing when glaciers are growing? (answer needs to be rounded to 4 decimal places) Need answer quickly, will rate fast!!

The data set below contains the number of partners in a cohort of rising accounting rms that have been taggel 25 2312 19 34 24 29 20 2719141814125 33 21 18 13 16 16 32 16 23 31 23 16 30 34 21181125 28 321216 :1. Compute the mean. median, and the mode. The mean is (Round to two decimal places as needed.)
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To study the relationship between the elevation and average annual precipitation in a nature preserve, rain gauges were constructed on different locations with elevation ranging from 0 to 5694 feet. After 30 years, the average annual precipitation for each location was calculated. Statistical software was used to conduct a simple linear regression

Problems: 1. Create a systematic list of all possible combinations of sex, hair color, and eye color. 2. Create a tree diagram that shows all possible combinations of sex, hair color, and eye color. 3. Create an area model that represents the probability of each combination of sex, hair color, and eye color. 21 22 23 24 25 26 Sex Male Female Male
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Hi all, I need help with the following questions: (Table attached for questions) [Part I]: A clinician was interested in determining whether psychotherapy would reduce symptoms associated with Antisocial Personality Disorder (ASPD) among a sample of male offenders. The clinician randomly selected 10 inmates that met criteria for ASPD according to
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2. Suppose that 10 sophomores enter a belching contest and that their respective skill levels are approximately the same. Six of the entrants are female and two of those are engineering majors. Three of the men are engineers. What is the probability that the winner will be a male engineering major? 3/10 A) 0.10 B) 0.30 C) 0.70 D) 0.90
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A scatter plot with a line of fit is given. scatter plot with points at 1 comma 2 and 1 comma 3 and 2 comma 4 and 3 comma 3 and 3 comma 4 and 4 comma 5 and 5 comma 5 and 6 comma 6 and 6 comma 9 and 8 comma 9, with a line of best fit drawn at y equals 1.33 plus 0.94x Which of the following is the most reasonable estimate of the correlation

Which of the following random variables is geometric? A.)The number of 3s when rolling a die 10 times B.)The number of heart cards obtained in a seven-card deal-out of a shuffled deck of 52 cards C.)The number of heads when a coin is tossed 25 times D.)The number of 5s in a row of 50 random digits E.)The number of digits in a randomly selected row

Complete the table to the right. nbsp Grade on Business Statistics Exam nbsp Frequency nbsp Relative Frequency A: 90-100 long dash 0.06 B: 80-89 36 long dash C: 65-79 84 long dash D: 50-64 38 long dash F: Below 50 30 long dash Total 200 1.00 Question content area bottom Part 1Part 2Part 3Part 4Part 5 nbsp Grade on Business Statistics Exam nbsp

The Jenck Auto Supply has a total revenue function given by R(z) = 2300x - 412 where x is the number of units sold lim R(x)
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An investor purchased 100 shares of Bank stock and 100 shares of Cooper Electric stock. The probability the Bank stock will appreciate over a year is 0.73. The probability Cooper Electric stock will increase over the same period is 0.59. (Round the final answers to 2 decimal places.) a. What is the probability that both stocks appreciate during

Use Excel or MegaStat to sort and standardize the data. What is the z- score for the following rent value? (Round your answer to 2 decimal places.) Rent value z -score770 What would the zsore be if the rent was 770

Suppose that 10% of the fields in a given agricultural area with about 2,500 fields are infested with the sweet potato white fly. One hundred fields in this area are randomly selected and checked for white fly. Can this be considered an almost binomial situation? Why or why not? Using the exact binomial calculation, find the probability that from

Which of the following is an example of a factorial design? Group of answer choices one independent variable with three or more levels. one independent variable with three or more levels and multiple dependent variables. two or more independent variables with two or more levels. one independent variable with three or more levels and one dependent

Plz answer these simple probability and statistics questions Question 2 (5 points) Cornell Police plan to enforce speed limits during the graduation weekend on four different routes into campus. The traps are at Rhodes Hall, Gates Hall, Weill Hall, and Rand Hall are operated 40% , 30%, 20%, and 30% of the time, respectively. Professor Richard Rand
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Acid rain, caused by the reaction of certain air pollutants with rainwater, is a growing problem in the United States. Pure rain falling through clean air registers a pH value of 5.7 (pH is a measure of acidity. 0 is acid, 14 i5 alkaline). A sample of n = 30 rainfalls produced pH readings with x = 3.7 and s = 0.6. Do the data provide sufficient
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Description of the Dataset its on excel How would I be able to send the data. Family: The family that the child belongs to, labeled by the numbers from 1 to 204 and 136A Father: The father's height, in inches Mother: The mother's height, in inches Gender: The gender of the child, male (M) or female (F) Height: The height of the child, in inches

Find a function in two variables of class C1 but it is not class C2.Describe it and explain

View Policies Current Attempt in Progress Investigating Hollywood Movies In the following exercise, we use data from HollywoodMovies. The dataset includes information on all movies to come out of Hollywood between 2012 and 2018. Audience Scores on Rotten Tomatoes The variable AudienceScore in the dataset HollywoodMovies gives audience scores (on a
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paraphrase this:In the "Mystery Data Detective" project, 6th-grade students become detectives tasked with solving a mystery using the power of statistics and probability. Working in small teams, students are presented with a series of mystery cases that involve analyzing data sets related to scenarios such as "The Case of the Missing Pets."

College students and STDs: A recent report estimated that 25% of all college students in the United States have a sexually transmitted disease (STD). Due to the demographics of the community, the director of the campus health center believes that the proportion of students who have a STD is lower at his college. He tests : versus : . The campus

18 pts Group of answer choices ensuring data is free of errors [ Choose ] deliberate or accidental omission of data [ Choose ] data scattered in the data base without any pattern [ Choose ] an apparent pattern of missing data [ Choose ] simplest approach to missing data [ Choose ] useful when data is missing however is biased [ Choose ] unexpected

Let r be a binomial random variable representing the number of successes out of n trials. (a) Explain why the sample space for r consists of the set {0, 1, 2, ..., n } and why the sum of the probabilities of all the entries in the entire sample space must be 1. Out of n trials, there can be 0 through n - 1successes. The sum of of the probabilities

Emissions of sulfur dioxide by industry set off chemical changes in the atmosphere that result in "acid rain." The acidity of liquids is measured by pH on a scale of0 0to14. 14.Distilled water has pH7.0, 7.0,and lower pH values indicate acidity. Normal rain is somewhat acidic, so acid rain is sometimes defined as rainfall with a pH below5.0. 5.0.

Federal Bank Prime date Funds Loan 31JAN1963 2.92 4.5 28FEB 1963 3 4.5 31MAR1963 2.98 4.5 30APR1963 2.9 4.5 31MAY1963 3 4.5 30JUN1963 2.99 4.5 31JUL1963 3.02 4.5 31AUG1963 3.49 4.5 30SEP 1963 3.48 4.5 31OCT1963 3.5 4.5 30NOV1963 3.48 4.5 31DEC1963 3.38 4.5 31JAN1964 3.48 4.5 29FEB 1964 3.48 4.5 31MAR1964 3.43 4.5 30APR1964 3.47 4.5 31MAY1964 3.5
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(c) Is the normal approximation to the binomial justified in this problem? Explain. Yes; np < 5 and nq < 5. No; np < 5 and nq > 5. Yes; np > 5 and nq > 5. No; np > 5 and nq < 5

1. _______________________ statistics are used to organize and or summarize the parameters associated with the data. statistics are used to organize and or summarize the parameters associated with the data. a. Inferential b. Associative 0. Organizational d. Decisive e. Descriptive . The Central Limit Theorem states that the distribution of sample
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Lack of symmetry is also called: Group of answer choices skewness. central tendency. unbalanced data. histography

By = arg min Ex,y [(Y - BIX) 2] B1 Prove that the optimal solution is Bi = Cov ( X, Y) + E(X E( Y) E(XY) Var (X) + (E(X) 2 E(X2) Note that if E(X ) = E(Y) = 0 then Bi = Cov(X, Y) / Var(X)
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Dr. Regalado gathers a sample of 100 youths and computes the mean number of times the youth in that sample have shoplifted. She then puts the sample back into the population and draws a new sample of 100 youth, for whom she computes the mean number of times shoplifted. Dr. Sanchez does this repeatedly. Flag question: Question 2 Question 20.5 pts

A multiple-group design compares three or more level(s) of the independent variable. Group of answer choices false true

A food service manager would like to know if average sales at their cafe have increased after a new advertising campaign. They have a random sample of 7 days prior to the campaign which yielded an average sales of $1179.3/day with a standard deviation of $127.1. After the campaign they randomly sampled 12 days and found an average of $1298.2/day

Choose the correct answer below. Statistics are the characteristics of the individuals of the population being studied

Produce a bar graph that shows the total number of injuries for each month (that allows you to compare direct and indirect) for each month. Ensure the graph is clearly labelled and has an informative title. In this question I have a injuries_direct and injuries_indirect columns and also a month column my question is on y axis I have to represent

15 th in t The sample space listing the eight simple events that are possible when a couple has three children is {bob, bbg, bgb, bgg, gbb, gbg, ggb, ggg}. After identifying the sample space for a couple having four children, find the probability of getting one girl and three ts fro boys (in any order). Identify the sample space for a couple
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Please help me with the solution to this problem. In a survey of a group of men, the heights in the 2029 age group were normally dimn'buled' with a mean of 6? 4 indies and a standard deviation of4 0 inches Astudy participant is randomly selected Complete parts [a] through (d) below. (a) Find the probability that a study participant has a height
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Mixed Review Use what you've learned on the previous pages to answer the following questions. If you think you need additional information to answer any of the questions, say so and indicate what information you think is missing. 1. Over a 20 week period of time, your national media plan delivers 10 weeks of network daytime television at 50 GRPs
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Hello. I need help with statistics, please! Thank you. d'escmes a poputeon of measurements that can assUme m aquency. tment samples on = 2 measurements that can be selected from this 25 33 34 35 44 45 55 24 2 32 33 34 35 I II II I II 44 52 53 54 55 II 5 34 35 42 43 45 52 53 545 ' Bundouiyselectedfrommepopulaonmhatismepmbabur
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Remember : You are only required to discuss the kind of sampling and sampling techniques that you have chosen for your study. For example: If you have chosen the qualitative research method then you will choose non-probability sampling and an appropriate non-probability sampling technique. You will then need to define and discuss the chosen

3. A study was conducted using a one-tailed t-test and a significance level of 5%. Hypothesis testing probability resulted in a p-value of 0.074. What is your conclusion

A polling company conducts an annual poll of adults about political opinions. The survey asked a random sample of 2277 adults whether they think things in the country are going in the right direction or in the wrong direction. 46% said that things were going in the wrong direction. Calculate the margin of error for the proportion of all adults who

Q2. (Write down the measurement unit when applicable and correct your answers to 4 decimal places.) According to the guideline from Dental Association, a dentist can use up to a maximum of 5 times of nitrous oxide ("laughing gas") in a single treatment. Let X be the number of times of nitrous oxide being used by a dentist in a single treatment.

Original Sentence: "You made several mistakes in the data analysis." * 2 points A. "The data analysis had numerous errors." B. "There are opportunities to refine the data analysis for greater accuracy. Let's review the details together." C. "There were mistakes in the data analysis." D. "Your data analysis contained several errors

I need homework help for these four questions. No Inbox - jgraham7@un x _ My Drive - Google Dr X Login | UMGC mylab.pearson.com/Student/PlayerHomework.aspx?homework STAT 200 7366 Homework: Set - Prerequisite Week 6 Homework Check here for instructional material to complete this problem. 2 'N Evaluate E = t 12 for t = - 1.44, s, = 0.81, s2 = 0.51,
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You are given a stack of 15 subway Metro Cards: 8 have no funds left, 3 have $2.00 each, and 4 have $3.00 each You hear the train coming. If it takes more than 3 swipes to get in, you will miss the train. What is the probability of that happening if you keep randomly selecting Metro Cards from the stack to swipe until you find one that works?

Write a sentence interpreting what the exact probability means in this context. Be sure to include a description of what "in the long run" means here. The 24 ways of returning four babies to mothers 1234, 1243, 1324

Sheila's doctor is concerned that she may suffer from gestational diabetes (high blood glucose levels during pregnancy). There is variation both in the actual glucose level and in the blood test that measures the level. A patient is classified as having gestational diabetes if the glucose level is above 140 milligrams per deciliter (mg/dl) one

QUESTION 1 5 points Saved A local university boasts that its School of Engineering attracts the top students from around the country. As proof of this claim, they say that the average Math SAT score for their students is higher than the average Math SAT score of 610 at most other Engineering Schools. A random sample of n=28 Engineering students is
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TheWhole Foods Market grocery store labels its express checkout lanes with a sign saying"10-ish items or less", indicating that customers don't need to worry about having exactly 10 items to use the lane as is the case with other stores. But it is important to make sure that the express lanes don't accept customers with too many items. The manager

Research Question: Is there a significant difference among the attitude toward science fairs of students' who either won 1st, 2nd, 3rd, or no award at all at the local science fair. Hal: There is no signicant dierence among the attitude toward science fairs of students' who either won 1st, 2nd, 3rd, or no award at all at the local science fair.
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Find the critical value tc for the confidence level c=0. 90 and sample size n = 21 tc= (Round to the nearest thousandth asneeded.)

Given a sample size of 25, standard deviation of 2.9, and a sample average of 21.92, we could be 95% confident that a population mean is between

A survey of 38 students at a business school showed the following majors: Accounting 10 Finance 7 E-Commerce 2 Management 9 Marketing 10 Suppose that you select a student and observe his or her major. a. What is the probability he or she is a management major? (Round the final answer to 3 decimal places.) Probability b. Which concept of

Part(c) please count to give a test statistic value of -4.4551. If testing at the 5% significance level, she should conclude: . A. there are more runs than would be expected in an in- dependent series, the serial correlation being negative. . B. there are fewer runs than would be expected in an in- dependent series, the serial correlation being
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Survey Question Answer Choices Variable Name Variable Type A. How old are you? (fill in the blank) Age Scale (ratio) B. Select your employment status from the three choices: 0-Not employed Employ Nominal 1-Part time 2-Full time C. How many minutes of screen time do you spend on your cell phone on a typical day? (fill in the blank) Cell Scale D. Do

COUN 6785: The scope of the problem for opioid usage, particularly involving fentanyl, has become an increasingly alarming issue among children and teens. From 2019 to 2021, overdose deaths among individuals aged 14-18 years surged significantly (Tanz, 2022). Despite an overall decline in illicit drug use among surveyed middle and high school

Please help me with these questions! \f\fThe graph of [x 332 + (y 43:2 = 4 is shown on the right. Use implicit differentiation to nd the slopes of the tangent lines at the points on the graph where x = 4.6. Check your answers by visually estimating the slopes on the graph in the gure. 4 Using implicit differentiation, the formula for y', the slope
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Question 8 (2 points) Suppose that there is a bag containing 7 marbles. How many ways can you draw 2 marbles from the bag? Assume that order does not matter. Hint: use the second Counting Rule. Your Answer: S Answer Question 9 (2 points) Reanswer the previous question with new numbers. Suppose that there is a bag containing 5 marbles. How many
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Please hele me ASAP!!!! Thank you so mcuh! Question 1. (10 points) Perform the computation below, showing clear work. Write the answer the form a+bi. a) (8-2i)(3+5i) 231: b) 3+i Question 2. (10 points) Solve the inequality and write the answer with interval notation. Sketch a graph to justify how you determine your answer. m25x>6 Hint: You may use
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A recent study finds a correlation of r = 0.42 between the number of ounces of coffee people drink per day and their level of stress (measured on a 100-point scale). This lets us conclude that.... Group of answer choices when people start to get more stressed out, it makes them want to drink more coffee. people who drink the most coffee also tend

Suppose a group compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x, be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Suppose that based on 9,320 observations, the sample mean interval was ;1 = 62.4 minutes. Let x, be a
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Sexual assault in college: In a Washington Post/Kaiser Family Foundation poll conducted from January through March 2015, 46% of adults (ages 1726) who attended college during the past 4 years say it's unclear whether sexual activity when both people have not given explicit agreement is sexual assault. The survey methodology section states that the

Let X,,...> > be a random sample generated from the normal distribution with mean , and variance Of, while y1,. . .> )m is a random sample generated from the normal distribution with mean /2 and variance o?. Suppose we use x- y to estimate H1 - H2. a) show that x - y is an unbiased estimator of H1 - H2 b) Find the variance of x - y c) find the 95%
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According to the website Tall Life, the heights of adult men in Spain are normally distributed with a mean of 173.1 cm and a standard deviation of 7.42 cm. Let????be a random variable representing the height in cm of men in Spain. a. Give the short form for???? b. Determine the following probabilities: i.????(???? <192) ii.????(????>189)

According to the Air Transport Association of America, the average operating cost of an MD-80 jet airliner is $2,087 per hour. Suppose the operating costs of an MD-80 jet airliner are normally distributed with a standard deviation of $174per hour. (Round the value of z to 2 decimal places. Round your answers to 2 decimal places.) (a) At what

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