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Mathematics Questions and Answers May 27, 2023

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4) Upon visual inspection, which trendline appears to be most resprentative of the time-series data? Sample Response: For this chart, the Moving Averages, with period 2, trend line appears to be most representative

Do 5 step test find pvalue and ttest

Need the solution to this quantitative reasoning problem aswell as how to solve it. \f
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1) You survey friends about the type of party they enjoy most. Gender Male Female Total 6 2 8 Party Bowling Type 3 11 14 Skating 4 Dancing 1 3 Total 10 16 26 1. P(Male or Skating)= 2. P(Male or Female)= 3. P(Female or Dancing)= 4. P(Not male or Bowling)= 2) Eighth grade students were asked whether they participate in an after-school activity.
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Site 1 Site 2 Leaf Stem Leaf 842 2 862 3 234689 4 0 5 8 6 Why are the numbers backwards for site 1? I though it would be 248, 268, 8

The owner of a fish market determined that the mean weight for a catfish is 3.2 pounds with a standard deviation of 0.8 pound. Assuming the weights of catfish are normally distributed, what percentage of samples of 4 fish will have sample means between 3 and 4? 66.9 30.9 84.1 44

Consider the probability distribution shown below x 0 1 2 P(x) 0.55 0.20 0.25 Compute the expected value of the distribution. (Enter a number.) Compute the standard deviation of the distribution. (Enter a number. Round your answer to four decimal places.)

If the total cost function for a product is C ( x ) =200(0.02 x +2) 3 dollars, where x represents the number of hundreds of units produced, producing how many units will minimize average cost? units Find the minimum average cost per unit. $

Seven-year-old Hector is team captain for the soccer team. They just won the championship game. They all received a pizza party. Four pizzas were provided to them with 10 slices for each pizza, 40 slices in total. There are 18 people on the team. There are four slices of pizza left over after everyone has had two. The coach wants Hector to decide

A university admissions committee looked at students' entrance grades to see if a certain university was lowering their grade requirements for students with athletic scholarships. A random sample of 23 first year students were selected from this university. Eight were offered basketball scholarships, seven were offered football scholarships, and

Use the Venn diagram or two way table from part C find the following Find P(S U T) Find P(S ? T) Find P(S|T) Find P(S^C) Intent! to take the Don't Intend to TOTAL AP exam, T take the AP exam Seniors, 5 17% 63% 80% Who are not 7% 13% 20% seniors TOTAL 24% 75% 00% ) "' PLOTI'ING THE DATA IN A TABLE, WE CAN SEE THAT THE TOTAL WILL ALWAYS BE 100%
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What does this chart suggest about the relationship between the class of automobile (compact. midsize, and large] and HwyM PG? The input in the box below will not be graded. but may be reviewed and considered by your instructor
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Sample proportions from two random sample of sizes 12 and 10 denoted by p 1 =0.6 and p 2 =0.38 For testing H 0 : 1 = 2 (say ) vs H 1 : 1 2 using =0.05, p 1 and p 2 are pooled to create a singlevaluethat gives Z STAT =1.03. The following statement (s) for testing H 0 is/are true a.Z STAT will be valid and efficient test statistic b. H 0 is accepted

What is the role of the StatExplore tool in SAS Enterprise Miner? Group of answer choices To export data to external files To generate predictive models To perform statistical tests To explore variable distributions and compute statistics

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The historical on-time percentage for Amtrak's Sunset Limited is 10 percent. In July, the train was on time 0 times in 33 runs. Hint: Use Excel to calculate the cumulative binomial probability P ( X 0 | n = 33, = 0.10). Assume = 0.1. (a) Choose the correct null and alternative hypotheses and decision rule. H 0 : .10 versus H 1 : < .10. Reject H 0

Consider the job of doctor. Which of the following is a theoretical criterion for this job? Question 35Select one: a. total number of medication errors b. total value of medical research grants obtained over a three-year period c. make patients feel better d. average number of medical associations joined

What is the r 2 value for a calculated correlation coefficient of 0.55?

Kindly Interpret the data and write in a paragraph: Paragraph (address the claim about the proportion): oSummary of sample statistics (x, n, and p) oConfidence interval, along with interpretation of the confidence interval oDescription of hypothesis test (alpha, test statistic, p-value, conclusion, interpretation)
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According to Chebyev's theorem, the. maxium proportion of data values from a data set that are more than 1.5 standard deviations from the mean true or false

Find the probability of standard normal random variable, z, lies between -1.00 and +2.00. Steps to follow Draw the normal distribution curve and mark the shaded region Write equation to find probability and show answers

As many as 7 million children in the US and Canada go through the same routine each night: turn off the lights, go to sleep, wet the bed

P-value from t stat. A test of H0 : = 0 based on n = 16 calculates t stat = 2.44. (a) Determine the degrees of freedom for the test statistic = 15 (b) Provide the t-values from the Table C that bracket the t stat. (c) What is the approximate one-sided P-value for the problem? (d) What is the two-sided P-value? I am stuck on b,c, and d.

Use properties of the indefinite integral to express the following integral in terms of the simplestintegrals: (7 x^ 26 x ) dx

Select the appropriate word to complete the sentence. Mis amigos estn _____ dnde vamos a comer. Multiple choice question. deciden decidir decidiendo decide

A financial analyst has designed two different investment options for a client, with the following statistics: 1212 128 5923 322 For investment option B, what is the value of the coefficient of variation, in percentage form. Please provide your answer in decimal form or percentage form, correctly rounded to two decimal places
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Need solution to the problem listed below aswell as an explanation to reach said solution. Thank you so much. \f
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which chart would be appropriate to compare staffed bed count in the three major hospitals in Las Vegas A line chart B pareto chart C pie chart D histgrom

What groups are patients randomly assigned to in a random clinical trial design? Question 15 options: a) To a placebo group or a control group b) To a wait-list control group or a placebo group c) To an intervention group or a pretest group d) To a placebo group or an intervention group

A psychologist studied self-esteem scores and found the sample data set of 57 people to be normally distributed , with a mean of 105 and a standard deviation of 6.What is the median of this distribution?

Consider the data set given in the accompanying table. Complete parts (a) through (d). a CIid
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Joan's finishing time for the Bolder Boulder 10K race was 1.84 standard deviations faster than the women's average for her age group. There were 395 women who ran in her age group. Assuming a normal distribution, how many women ran faster than Joan? (Round down your answer to the nearest whole number.)

A cholesterol level test was performed on a group of 30 patients. If the known mean is 240 with a standard deviation of 12, What is the probability that one of them has a level between 245 and 250?

Clipboard Font Al Alicia's Transcript C D E F A B 1 Alicia's Transcript Course Number Term Section Credits Letter Grade PSYC 305 14 A+ PSYC 310 /4 A- PSYC 315 /4 B PSYC 363 12 C- BIOL 263 D+ 9 Barney's Transcript 10 Course Number Term Section Credits Letter Grade 11 PSYC 305 /4 B 12 PSYC 310 /4 13 PSYC 315 /4 B- 14 PSYC 363 12 D + 15 BIOL 263 12
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Let's verify whether the collected sample is reflective of the students that are enrolled in the university or visiting dining facility. a. At 90% confidence, test the hypothesis that collected sample has same proportion of freshmen, sophomore, junior, and senior students as enrolled in the university. In the answers provide test statistics, p

True or False: In a certain marathon, the average time to complete the race was normally distributed with mean = 4.15 hours and standard deviation = 0.84 hours. If we wanted to give medals to the 4% of the runners with the best times, people who completed the race in 2.68 hours or less will get medals. False True

4. Independent random samples of 126 playas with cropland and 98 playas with grassland in the Southern Great Plains yielded the following summary: X1 = 14.06, X2 = 15.36, $1 = 4.83, $2 = 4.95, n1 = 126, n2 = 98 Do the data provide sufficient evidence to conclude that a difference exists in the mean number of native species in the two regions at 5%
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A teacher selects 6 students from a class of 35 students to represent the class at the Board of Education. Find the number of different ways that the instructor can choose the students if order does not matter. Find the number of different ways that the instructor can choose the students if order does matter.

Para obtener el tiempo por datos estndar de una operacin de taladrado, el analista depende de los siguientes factores, excepto Pregunta 7Respuesta a. La habilidad o experiencia del operario b. La profundidad del hueco a taladrar c. Las revoluciones del taladro d. El dimetro de la broca a utilizar

1. Refer to the Preview 12 Part 23.A to enter the mean, standard deviation, and sample size foe each type of solar panel, and then calculate the variance for each of the three types of panels and place the results in the table below. Round variance values to the Ernearest tenths place. Fixed Tracking Concentrated Mean Standard Deviation Sample
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In the city of N, the road system is set up like a Cartesian plane. Point B is 7 blocks east and 17 blocks north from point A. Point C is 19 blocks west and 6 blocks south from point A. Find the distances between each pair of points.

Which ones of these are true, and which are false? a) ryx1 = 0.01, ryx2 =0.75, R = 0.2 (b) The value of the residual sum of squares, SSE, can increase as we add additional variables to the model. (c) For the model E(y) = 0 + 1x1, y is significantly related to x1 at the 0.05 level, but when x2 is added to the model, y is not significantly related

With an average service rate of 15 customers per hour and an average customer arrival rate of 12 customers per hour, calculate the probability that actual service time will be less than or equal to five minutes.

Suppose we want to see if American children have higher levels of cholesterol than the average child (i.e., in the entire world - the total population). We find that the population average for cholesterol for children all over the world is 190.We test 25 US children and find an average of 201 with a standard deviation of 10.Conduct a hypothesis

Multicollinearity is Question 5 options: A) When the coefficients of two variables have strong correlation B) when an explanatory variable and another variable have strong correlation C) when two variables have strong correlation D) when there are two explanatory variables that have a strong degree of association

A soft drink machine outputs a mean of 25 ounces per cup. The machine's output is normally distributed with a standard deviation of 3 ounces. What is the probability of filling a cup between 23 and 31 ounces? Round your answer to four decimal places

Based on the following reported results, which study used the most subjects? Group of answer choices Dependent t(19) = 2.17 z = 1.29, n = 21 Independent t(20) = 4.57 F(3, 16) = 3.16

Tuition of $1973 will be due when the spring term begins in 8 months. What amount should a student deposit today, at 5.78%, to have enough to pay tuition?

If I have flipped and unbiased coins three times and got heads is it likely that I will get tails the next time I flip the coin?

#5 The mean height of an adult giraffe is 19 feet. Suppose that the distribution is normally distributed with standard deviation 1 feet. Let X be the height of a randomly selected adult giraffe. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N b. What is the median giraffe height? ft . c. What is the
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In a population of adults, the mean pulse rate is 75.4 beats per minute. A random sample of 50 adults is selected from this population, and the sample has a mean pulse rate of 72.8 beats per minute. We call the number 72.8 a ___________________ and the number 75.4 a __________________. Group of answer choices statistic; parameter , parameter;

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The caller times at a customer service center has an exponential distribution with an average of20seconds. Find the probability that a randomly selected calltime will belessthan30seconds?(Round to 4 decimal places.)

The numbered disks shown are placed in a box and one disk is selected at random. Find the probability of selecting a green disk, given that the number selected is at least 3 . Blue disks are numbers 1,2,6, and 8 Green Disks are numbers 3,4,5, and 7

if u = (2,2,2,-1) and v = (-3,-3,3,2), find 2u - 3v

To be hired by a fictitious company, a candidate is required to be able to type at least 100 words per minute. John is applying for a job at this company, and the company wants him to have a 30 days trial period, where John will need to type several documents, for each of which his typing speed will be recorded. The manager is trying to decide how

https://www.statista.com/statistics/299153/apple-smartphone-shipments-worldwide/ using the link above: 1. Plot iPhone sales over time. 2. Compute the moving average for sales, using an appropriate interval, and plot the smoothed data over time. 3. Run an appropriate regression model to capture the product life cycle phenomenon on the smoothed data

slope , intercept, room rate in Chicago, entertainment expense for Chicago Formatting Table Undo Clipboard Fant Alignment Number Styles X V Use the area below to draw a scatter diagram. I U LL Hotel Room Rate Entertainment City Part a. Use the area below to draw a scatter diagram Boston 144 159 Denver 106 Nashville 103 Nmtino New Orleans 109 142
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Kindly provide explanation: Q1. The number of computers assembled by a firm each month is associated with the number of unskilled labor hours used, the number of skilled labor hours used and the kilowatt-hours (KWH) of power used by the assembly operations. A multiple regression model with Log transformation of all variables is used to explain the
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if given the same mean and standard deviation, can you draw a graph at kurtosis = 3 , kurtosis = 4 kurtosis = 2 ? I want to know the change of the how the change of the graph will be compare with normal distribution.

Have you attended any historic women's March or any important march that is covered in "not done: women remaking america? why or why not?

A committee of 6 people is to be selected from a group of 8 men and 6 women. If the selection is made randomly, what is the probability the committee will consist of 3 men and 3 women? (Round your answer to three decimal places.

Father's and Son's Weights A physician wishes to know whether there is a relationship between a father's weight (in pounds) and his newborn son's weight (in pounds). The data are given here. Father's weight(x) 205, 196, 176, 210, 187 Son's weight(y) 7.9, 10.5, 8.8,5.7, 13.7, 11.5

Tuition of $1600 will be due when the spring term begins in 10 months. What amount should a student deposit today, at 7.99%, to have enough to pay the tuition? The deposit today should be _______???

Construct the indicated confidence interval for the population mean mu using the t-distribution. Assume the population is normally distributed. cequals0.98, x overbarequals13.3, sequals0.74, nequals18 Question content area bottom ( ____, ____) (Round to one decimal place as needed.)

Lisa is an elementary school teacher and she is taking two children from her class to a mathematics competition. All students in her class are either 10 or 11 years old. She randomly picks two children from the entire class. The tree diagram below shows the probabilities of the different outcomes. tree diagram Tree diagram with outcomes. Based on

A researcher obtains a sample of n=34 individuals from a population with unknown parameters. The goal is to use the sample to estimate the population mean. If a sample mean is 52 and the standard deviation is 3.20, then what value should be used as the point estimate of

The process of ensuring each table's attributes are fully dependent on each multi-valued key is: Select one: A. first normal form B. second normal form C. third normal form

During an election, an exit poll is taken on 400 randomly selected voters and 214 of those polled voted for Candidate "Jim". A majority is needed to win the election. We want to see if we can conclude that the majority (more than 50%) will vote for Candidate "Jim" based on our sample proportion from the exit poll. In this scenario, the null

16. Why do we always round up when nding the appropriate sample size to achieve a certain margin of error, even when the value after the decimal point is less than .5? (For example if we solve for n and get 422.2 households, why do we round this up to 423 households when reporting the required 11?)
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A group of 22 students took an IQ test during a study. The subjects had a standard deviation IQ score of 14.3. Construct a 95% confidence interval estimate of the standard deviation.

A construction company has been hired to build a custom home. The builder estimates the probabilities of potential profit (or loss) as shown in the table below. What is the profit expectation for the company? $ Profit/ Loss Probability $100,000 0.10 $60,000 0.30 $30,000 0.35 0 0.15 -$20,000 0.08 -$40,000 0.02
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A group of 54 people were asked if they were university graduates and if they belonged to a union. 25 were not graduates, 19 were union members, and 20 were non-union graduates. How many people were neither graduates nor union members?

Insurance: Claims Do you try to pad an insurance claim to cover your deductible? About 40% of all U.S. adults will try to pad their insurance claims! (Source: Are You Normal?, by Bernice Kanner, St. Martin's Press.) Suppose that you are the director of an insurance adjustment office. Your office has just received 128 insurance claims to be
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The point of intersection for the lines described by the equations y - 3x - 2 0 and y - 8x + 7 0 is: a. no point of intersection b. (1.8, 7.4) c. (3/4, 8/7) d. (7.4, 1.8

Sketch and Identify the surfaces: a. y=(x^2)+(z^2) b. p= 2csc @ and explain. ( for b the p is the Greek p for spherical equations and the @ is phetta or the angle symbol.)

Based on Table 1 and Table 2, how does the death rate (not death numbers) from COVID-19 for Chicago vary from that for the United States? Show your calculations. Table 1. COVID-19 morbidity and mortality by geography (as of 4/6 - 4/12/2023) Geography Total Cases Total Deaths Chicago 753,966 8,049 Illinois 4,122,046 36,687 The U.S. 104.242,889
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Spinning a coin, unlike tossing it, may not give heads and tails equal probabilities. I spun a penny 250 times and got 104 heads. We wish to find how significant is this evidence against equal probabilities. a. What is the sample proportion of heads? Round to 3 places. b. Heads do not make up half of the sample. Is this sample evidence that the
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What type of statistical test would you use to compare a numerical variable (ex: rate) among 2 groups (categorical variable)? How about 3 groups?

Only answer the following question regarding the above questions: D. Forecast for April using exponential smoothing with alpha = 0.6, given that March forecast was 38.

Which of the following should you avoid using when sampling for which interactions or behaviors to observe in observation research? Group of answer choices theoretical sampling random sampling convenience sampling strategic sampling

Let X have pdf fX(x) = 2 / 9 (x+ 1 ), -1

An engine manufacturer is testing the amount of air pollution (in milligrams per cubic metre of exhaust) emitted by a new rotary engine. The manufacturer randomly selects four rotary engines and subjects them to a pollution test. It is found that these four engines emit 71, 74, 73 and 74 milligrams per cubic metre. a. Assuming normality, construct

given alpha is 200, n=30 wats the standard of the mean? 6.67 200 36.5 1095.5

Consider a manufacturing process for making pistons from metal ingots in which each ingot produces enough material for 1000pistons. Sometimes, a piston cracks whilst cooling after being forged. Previous research has shown that, in a batch of 1000pistons, the average number of pistons that develop a crack during cooling is dependent on the purity
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(1 point) A box contains one yellow, two red, and three green balls. Two balls are randomly chosen without replacement. Define the following events: A : { One of the balls is yellow } B : { At least one ball is red } C : { Both balls are green } D : { Both balls are of the same color } Find the following conditional probabilities: (a) P(A [B) =
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Which of the following answer is correct? (Round your answer to 1 decimal place) Question 22 options: 3-month moving average = MAD (11.2) Exponential smoothing with alpha of .2 = MAD (10.9) Exponential smoothing with alpha of .4 = MAD (10.4) 5-month moving average = MAD (11.4)

Given thatP(A or B)equals= 1/2 , P(A)equals 1/4, andP(A and B)equals=1/6, findP(B).? A. 5/12 B. 7/12 C. 1/4 D. 11/12 Find thez-score that has 93.82 93.82% of thedistribution's area to its left? A. 1.54 B. 0.155 C. 0.155 D. 1.54

During a monthly sales meeting, a worker at an ice cream parlor mentions that female students tend to prefer chocolate ice cream, whereas male students tend to prefer vanilla ice cream. The worker is interested in formally answering the following question: How different are the proportions of female and male college students in the United States

(2.2) A coin is tossed and a die is rolled. What is the probability that the coin lands tails up and the number rolled is an odd number? (2.2) A coin is tossed and a die is rolled. What is the probability that the coin lands tails up and the number rolled is an odd number? 25% 8.3% 16.7% 83% 50%

Dr. Waters is designing a questionnaire to assess the effects of social distancing on mental health. He plans to measure social distancing behaviors with a self-report questionnaire, but he's concerned about fence-sitting response sets. Which of the following might you recommend to decrease fence sitting? Group of answer choices Using scales with

You are given 10 points {0.19529091,0.93106584,0.15147936,0.43860253,0.15290169,1.18712532,0.2587244,1.67139275,0.55631196,2.11156991}{0.19529091,0.93106584,0.15147936,0.43860253,0.15290169,1.18712532,0.2587244,1.67139275,0.55631196,2.11156991} that were drawn i.i.d. from Laplace distribution with scale 1, which has the probability density

Use the graph of y = f ( x ) and the given c -value to find the following, whenever they exist. (If the limit is infinite, enter '' or '-', as appropriate. If the limit does not otherwise exist, enter DNE.) c =10

Scenario/Research Question:What impact do zinc supplements have on birth weight of full-term infants? Variables:zinc supplements - independent birth weight - dependent Population:full-term infants Null Hypothesis:There is no impact of zinc supplements on the birth weight of full-term infants. SPSS Output Frequencies Statistics Treatment

Explain the purpose of using inferential statistics in medical research. Please provide a scatter plot graph, depicting any medical research related information. Explain what the scatter plot is depicting. Use layman's terms, and do not copy bodies of text from the research itself. Explain why inferential statistics was most appropriate and

When using more than one test or predictor to determine who to hire, one must decide on a method for combining test scores to identify the best applicant. The __________ approach involves setting a criterion for each predictor. If the applicant surpasses the criterion, he or she passes that phase of the selection process and is considered during

In 1905, what percentage of youth graduated from high school? Question 15 options: a) 2 percent b) 8 percent c) 15 percent d) 25 percent

Scenario/Research Question:What is the impact of seat belt use on length of stay in the pediatric ICU following traumatic brain injury? Variables:seat belt use - independent length of stay ion pediatric ICU - dependent Population:children with traumatic brain injury Null Hypothesis:the use of seat belts has no impact on the length of stay in the

A motorcycle shop has 42 choppers, 80bobbers, and79cafracersdifferenttypesof vintage motorcycles. How many ways can the shop choose 1 chopper, 1bobber, and 1 caf racer for a weekend showcase?

please answer the question,.within 30 minutes. make sure the explanation and calculations are explained in very detailed manner. else leave it for other tutor otherwise i will give negative ratings and will also report your answer for unprofessionalism. Make sure the answer is 100% correct and IS NOT COPIED FROM ANYWHERE ELSE YOUR ANSWER WILL
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