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Mathematics Questions and Answers June 04, 2023

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The mail arrival time to a department has a uniform distribution over 0 to 60 minutes. What is the probability that the mail arrival time is more than 20 minutes on a given day? Answer: (Round to 2 decimal places.)

It is estimated that sugar-sweetened beverages a significant amount of calories to the typical American diet. Beverages account for approximately how much of the total calorie intake in most eating patterns

Question 15 (1 point) The assembly time for a product is uniformly distributed between 6 to 10 minutes. The expected assembly time (in minutes) is ____________ Question 15 options: a) 8 b) 4 c) None of the options d) 2 e) 16 Question 16 (1 point) The assembly time for a product is uniformly distributed between 10 to 16 minutes. The expected

In order to draw a conclusion, the results of an experiment should be compared to the Group of answer choices prediction. causal question. experimental data hypothesis. Flag question: Question 26

Select all that apply What are some risks of using capability indexes? Multiple select question. If the process is not stable, Cp and Cpk are meaningless. If the process is not centered but Cp is used anyway, it gives misleading indications. If the process stability is checked too often, it gives conflicting signals. If the process output is not

An advertisement claims that fast food breakfast sandwiches average less than 25 grams of fat. A sample of 15 sandwiches has a mean of 23.4 grams with a standard deviation of 9 grams. Using a significance level a =0.05 is there evidence to support the claim? Which TI 83/84 calculator command should be used to conduct this analysis

in ISLR Credit dataset, Which statement correctly describes the residual vs fitted plot for the model? Which statement correctly describes the residual vs fitted plot for the model? The residuals are randomly scattered around 0, suggesting that the model is a good fit. The residuals show a distinct "V" pattern, suggesting that model has room for

Q29: What is the sample mean of GPA1 for male students? (Round answer to 4 decimal places.)
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positive affects for problem solving skills of gifted students

. Question 2 Tacoma's population in 2000 was about 200 thousand, and has been growing by about 8% each year. If this continues, what will Tacoma's population be in 2017? thousand people Submit
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Actor 5 Number Summary: 31 , 37.25 , 42.5 , 50.25 , 76 Actress 5 Number Summary: 21 , 32 , 35 , 41.5 , 80 Actor Acress.gif Consider the distributions of ages for Oscar winning actors and actresses. What is the IQR for actresses

Suppose we are interested in investing in one of three investment opportunities: d 1, d 2, or d 3. The following profit payoff table shows the profits (in thousands of dollars) under each of the 3 possible economic conditions: s 1, s 2, and s 3. \f
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In one statistics course, students reported studying an average of 9.92 hours a week, with a standard deviation of 4.54. Treating the class as the population, what is the percentile for a student in the class who studies 11 hours a week? (Round z score to two decimal places.) 40.52 9.48 85.99 59.48

The odds of Macy passing her driver test on the first try are 7:4. Determine the probability that she will pass her driver test

Item11 Item 11 When studying the effect of temperature on the sales of ice creams, a researcher records the number of ice creams sold on cold days and the number sold on hot days. In this scenario, the researcher will most likely compare ________Blank to describe the results. Multiple Choice frequency polygons estimated scores group percentages

You have a container with 7,030 milliliters of liquid. How many liters is this? Enter only the value, don't write letters or words for the units.+

Which of the following is NOT true of frequency and percentage distributions? Group of answer choices They quickly communicate how many respondents voted for each of the different answers for a question. They reveal how much agreement or disagreement there is among the respondents. They express the variability of the respondents' responses. The

The webmaster at Match.com, an internet dating site, recorded the number of hits at 1-minute intervals for a certain period of time. The results she obtained are summarized in the histogram below. Use the graph to answer the following questions. \f
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Why is it important to know the population standard deviation when estimating the population mean? Multiple choice question. The mean is used in calculating the population standard deviation. Knowing lets us use the standard normal distribution to construct a confidence interval. The sample standard deviation cannot be used to estimate the

Which of the following correlation coefficient values indicates the weakest relationship? Question 10 options: a) +0.05 b) +0.80 c) -0.95 d) -0.78 e) -0.50

Which of the following is true of the correlation coefficient? Multiple Choice It is a statistic that indicates the amount of spread in a distribution of scores. It is a measure of variability. It is a statistic that describes how strongly variables are related to one another. It is a measure of central tendency

Label each example with the correct type of sampling. systematic sampling cluster sampling oversampling quota sampling A researcher approaches every fifth shopper who walks into a grocery store. Press Space to open Researchers select five hospitals at random and survey all the nurses in each hospital. Press Space to open Researchers conducting an

An increase in police patrol is accompanied by a decrease in youth violence is an example: Question 9 options: a) negative correlation b) positive correlation c) no correlation d) zero correlation e) high correlation

Select from these study designs, using each only once: Case control study Prospective cohort study Retrospective cohort study Cross-sectional study Intervention trial Select from these measures of association and tests of significance, some of which are used more than once: Chi-square Chi-square w/o Yate's Correction Difference between the means

1. For each equation below, identify the unknown function, classify the equation as linear or non-linear, and state its order. (10 pts). dy (a) vy +xy = 0. (b) u" + u = cost (c) " = -since
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Reflecting on Your Own 1. Create a linear function of the form f(x) = mx + b. 2. Construct a table of values for f. X f ( x ) 3. Construct a graph of your function using the points from your table of values. 4. Copy the axes, graph, and points onto the patty paper
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A study is investigating whether student grades are impacted by their attendance of classes. As such, the two variables of interest are how many classes a student attended, and their grade on the final test. Which of these variables is the dependent variable? 1.Number of classes student attended during semester 2.Final test grade

Se realizan los siguientes depsitos en una cuenta de ahorros que le reconoce una tasa del 24% CM; $500.000 en el tercer mes, $800.000 en el octavo mes. Calcular: Saldo en la cuenta al final del ao. Pregunta 2Seleccione una: a. $2230.500 b. $2,463.400 c. $1534.356 d. $1463.492

A recent study investigated the effects of sugar-sweetened beverages on type II diabetes. The researchers pooled data from 18 eligible studies and performed statistical analysis on it. They found a significant association between the consumption of sugar sweetened beverages and type II diabetes .Which one of the following study types best matches

The objective of this assignment is to do an experiment of your own at-home! In the context of calculating and demonstrating Molarity, students must select an at-home solute (i.e. table salt) and an solvent (i.e. water) and perform a simple experiment. Within the submission, students must highlight experimental variables, prepare sample

Now suppose that the estimate of the model produces following results: =344.585 , ba=0.102 , bp=13.397 , sba=0.173 , sbp=4.312 , R2=0.813 , and F-statistic=11.361 . Note that the sample consists of 10 observations

Cold probe data is Group of answer choices a. Taking data on a target that has not been tested in over a week b. Taking data on each repetition of each target c. Data recorded on the first presentation of each target in a ITT session d. Graphed data points depicting the leaner's progress

What is the slope of a line that passes through the points(5,3) and (7,-4)

which of the following is true regarding the income statement

Often uncertain, which of these refers to the difference in a variable measured over observations? a. Frequency distribution b. Perception c. Variation d. Population

A large cookie jar contains the following selection of mini-cookies: 10 sugar, 14 oatmeal raisin, 18 peanut butter and 6 chocolate chip cookies. Select 2 cookies, one at a time, without replacement. Compute the following probabilities. a- probability of getting 2 peanut butter cookies b- probability of getting 2 sugar cookies c- probability of not

Of the following, which is the first step in the scientific method Establishing a principle Establishing a law Stating a theory Determining the facts Stating a hypothesisA suggested and testable explanation for an event is called a _________ Hypothesis Variable Control Theory

12. How many binding posts can be cut from a brass rod 42% inches long if each post ! 3 is 1 3 inches long? Allow n inch waste for each cut
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Corn on the cob is classified as part of the vegetable group on MyPlate. Question 6 options: True False

We intend to estimate the average driving time of a group of commuters. From a previous study, we believe that the average time is 42 minutes with a standard deviation of16 minutes. We want our 99% confidence interval to have a margin of error of no more than plus or minus3 minutes. What is the smallest sample size. Hint: Don't forget that your

Arm span is the physical measurement of the length of an individual's arms from fingertip to fingertip. A man's arm span is approximately normally distributed with mean of 70 inches with a standard deviation of 4.5 inches. Find length in inches of the 99th percentile for a man's arm span. Round answer to 2 decimal places.

b.) within what interval would you expect the sample mean to fall, with 99 percent probability

t = 4 Weighted Moving Averages t = t(-4 to -1) at .4,.3,.2,.1 Jan 50 Feb 55 March 45 April 42 (50 +55+45+42)/4 = .4(42)+.3(55)+.2(45)+.1(42) = May 48 (55+45++42+48)/4 = .4(55) +.3(45)+.2(42)+.1(48) = June 46 (45+42+48+46)/4 = .4(45) +.3(42)+.2(48)+.1(46) = July 52 ETC......... ETC...... August 51 September 52 October 49 Simple Average __________

A inovao escolar influenciou no aconselhamento a partir de: Selecione uma ou mais opes de resposta: a. Entender que a mudana educacional exitosa quando se considera o significado atribudo a seus agentes. b. Compreender que a mudana na escola deve ser feita a partir da cultura da comunidade educativa. c. Afirmar que o conhecimento dos professores

Use the knowledge you gained from this module's resources to identify data and evidence for fraudulent activity and develop a fraud hypothesis. There are two parts to this milestone

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1 point 5 Line Ais given by the equation: -6x + -9y =-11 Line B is given by the equation: 4x + -2y = 42 What is the x coordinate of the intersection point of line A and line B? (Round your answer to the nearest hundredth) Type your
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Researchers wish to keep ________ variables to a minimum so that the effects of the independent variable on the ________ variable are as clear as possible. Group of answer choices extraneous; nuisance extraneous; dependent controlled; dependent controlled; independent

A ______ tells you what percentage of a distribution scored below a specific score

6 60 22-23: Write the equation of the function with integer coefficients that has the given roots. 22. x = 2, , and i 23. x = -2 + 3i and 4 (multiplicity 2) Ex8
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A sequence of integers are generated randomly. Each integer is uniformly distributed in the range of [1, 10]. Generations of different integers are mutually independent. How long does sequence need to be so that the probability of observing the digit 8 at least once is larger than 9/10
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Find the surface area of a cylinder if the height is 12 inches and the radius of the base is 7 inches. Use 3.14 for and round to the nearest tenth

Which of the following statements is not true? a. SMF supports lower bandwidths than MMF. b. MMF is better suited than SMF to backbone connections within the data center. c. SMF has a thinner core than MMF. d. MMF signals experience greater reflection within the core than SMF signals

Suppose a company packages sugar in 5 kg bags.The actual amount of sugar in the packages is normally distributed with a mean of 5.01 kg and a standard deviation of .03 kg of sugar. If 45 packages are randomly selected, what is the probability that the mean sugar package weight is at least 5.01 kg.

In 1980 a study was conducted in the United States to see if having a pet increased the survival rate for people with heart disease. The study looked at the one-year survival rate for people who had been discharged from hospital after being hospitalized for heart disease. The two-way table displays some of the results. 92 people participated in

In a pie graph sector proportions are determined by which? Group of answer choices The length of an arc around the perimeter The importance of the particular data set The mean of the values in the sector The variability in the data in the sector

Which of the following data analysis tools in Excel can generate the same information as shown in the table above? ANOVA: Two-Factor without Replication ANOVA: Two-Factor with Replication ANOVA: Single Factor T-Test: Two-Sample Assuming unequal variance

A criminal justice researcher is interested in studying the relationship between the religious affiliation of offenders and sentence (in years) handed out. Here is the data she is working with: CatholicsProtestantsJewsMuslims 10101212 16101212 16161610 12131612 12131813 13121316 14121313 12181113 12111211 12121412 What are your conclusions about

Suppose a random variable, x, follows a Poisson distribution. Let the expected value = 1.25 every minute, find the P(x=125) over an hour

Categorical(qualitative) variables can be always transformed to numerical(quantitative)- 1.True 2. False

maria compro tela con los 5000 que tenia y con la tela cocio 150 camisetas

mean 2,242,920 standard deviation 1,795,920 x=447,000

To get the best deal on a microwave oven, Jeremy called six appliance stores and asked the cost of a specific model. The prices he was quoted are listed below: $663 $273 $410 $622 $174 $374 Find the variance for the given data

Anabel runs a restaurant and is interested in the factors that affect her customers' experiences eating their meals at her restaurant. She wants to know the average amount of money people spend in her restaurant and she also wants to know the standard deviation, so she asks simply how much they spent on their meal. She found the deviation score

content area top Part 1 A barrel partially filled with liquid fertilizer weighs 229.22 lb. The empty barrel weighs 16.47 lb, and the fertilizer weighs 9.25 lb/gal (pounds per gallon). How many gallons of fertilizer are in the barrel

When is it acceptable to provide a statistical test abbreviation in the paper? It is never acceptable to provide a statistical test abbreviation in the paper. It is always acceptable to use a statistical test abbreviation in the paper. It is acceptable to provide a statistical test abbreviation if you provide the full term and its abbreviation at

Dr. Fauci is testing new social distance guidelines designed to reduce the spread of Covid-19. If he concludes that social distance guidelines reduced the spread when they really did not have an effect, which type of error would this be

Please help with the following statistic question. Thanks (PS hope your safe from this virus :)) \f
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Which of the following statements is not true? Group of answer choices Data is used to distinguish between facts and opinions. Data is a value-free mechanism for understanding phenomena. Data provides explanations based on the researcher's values and beliefs. Data is used to simplify questions and answers about social phenomena

In the quadratic regression screen shown in the problem statement, why is the value of the coefficient a negative? A. Since the height increases then decreases, the quadratic graph must open downward, not upward, which means a must be negative. B. Since the height of the ball starts at the height of the person throwing the ball, the quadratic

5 1 point Line M is given by: y = -6X + 25 Line N is given by: y = -8X + 18 What is the horizontal coordinate of the point of intersection of Line M and Line N? (Assume X is graphed on the horizontal axis, Y on the vertical) (Round your answer to the nearest hundredth) Type your answer... Previous Next
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find the margin of error for the given values of c, s, and n c=0.80 s=3.1 n=26

Rewrite (108 + 224) using factoring. 2(106 + 112) 4(27 + 56) 6(17 + 6) 12(8 + 27)

Which of the following statement is true when dotted points are closer to the best fitting line? Question 21 options: a) The relationship between the two variables are stronger b) The direction could either be positive or negative c) The correlation coefficient value is higher d) We can better predict the dependent variable e) All of the above

What is the Expected number of customers with memberships who will use the discount

Assume that a student is chosen at random from a class. Determine whether the events and are independent, mutually exclusive, or neither. A: The student is a man. B: The student belongs to a sorority

Evaluate the algebraic expression. (x + y)2 |z + y| for x = 3, y = 2, and z = 6

The R-squared value ( \f
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I was confused on how to find the answer based off the letters. Is the r code right, and if it is show how to find the answer. Correct the r code as necessary. \f
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Hi! I need help with a statistics exercise. I hope you can help me. Thanks in advance! Question: A car suffers a puncture every 8,000 km. We have to cover a distance of 16,000 km with this car. What are the chances out of 100 of having more than one puncture. The answer should be 59.4% and a Poisson distribution must be made

pleas ehelp Seven students on an intramural team weigh 186 lb, 186 lb, 181 lb, 192 lb. 176 lb, 195 lb and 186 lb. What is the standard deviation of the weights of these students? m The standard deviation is D. (Round to the nearest tenth.)
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A research study aims to assess the impact of a dietary intervention on weight loss. The study involves 120 participants who are randomly assigned to two groups: one group follows a low-carb diet, and the other group follows a low-fat diet. The participants' weights are recorded at the beginning of the study and after 6 months. What is the

Show that z is an imaginary number (no real part) if and only if z = z(bar - there should be a bar over the -z)

Interpret the slope coefficient 0.54 on educ (explain in words what it means; how wage is correlated with education).

Given these tests: Independent Samples T tests, Paired sample T tests, Repeated Measures Anova, one way analysis variance Anova, Cochran's Q test, Mann Whitney U, Wilcoxon signed rank test, One sample T test, Friedman test, Kruskal Wallis test, one sample chi square, fisher's exact test, odds ration, X2, McNemar's test, Pearson Chi-Square test, :

Chapter 6 Homework Alliger Stat book 1. The definition of probability is: a. the fact that an event will occur b. an event will occur all of the time c. the chance of an event occurring d. the fact that event will never occur

If, for the given data set, if the mean is 40, find the value of x. 36, 41, 37, 40, 39, x Question 24 Select one: a. 51 b. 47 c. 50 d. 43

In 1-3 Sentences why is D the correct answer A negative value for a correlation indicates _______________ A. a much stronger relationship than if the correlation were positive B. a much weaker relationship than if the correlation were positive C. increases in X tend to be accompanied by increases in Y D. increases in X tend to be accompanied by

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Termi "t dhna t testit" i referohet: A) T dhnave t prpunuara dhe t pikzuara t prgjigjeve t klientit. B) T dhnave t paprpunuara dhe t pikzuara t prgjigjeve t klientit. C) T dhnave q lidhen me shnimet dhe regjistrimet q bn klienti. D) T dhnave q lidhen me shnimet dhe regjistrimet q bjne palt e treta

Answer this Exam #3A Problem 3: (20 points) Suppose X is a uniformly distributed continuous random variable over [1, 3]. a. (10 points) If Y = 4X2, find f (y), the PDF of Y. Indicate the range for which it applies. 12.5 b. (10 points) What is the expected value of Y
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For experimental researchers, their desired outcome is that the effects of their independent variables are significantly larger than the effects of random sampling error. Group of answer choices True False

In what follows use any of the following tests/procedures:Regression, multiple regression, confidence intervals, one sided T-test or two sided T-test. All the procedures should be done with 5% P-value or 95% confidence interval. Some answers are approximated, choose the most appropriate answer. OpenCars04data. SETUP:It is believed that BMW models

On average, the printer uses 500 sheets of paper each day with a standard deviation of 10 sheets. What is the probability that the printer uses more than 508 sheets of paper?

Which of the following would be appropriate for measuring relationships between two variables using parametric statistics? A. Pearson's r B. T test C. Spearman's rank order D. ANOVAThe article states that "Among the participants, 80.6% of them were Caucasian (n = 29), 16.7% were African American (n = 6), and 2.8% was Asian (n = 1)." This is an

The final cumulative frequency is equal to N. Question 29 options: True False

What is the main relationship between payload and range performance of an aircraft? Group of answer choices a) Payload and range are inversely proportional. b) Payload and range are directly proportional. c) Payload has no impact on range performance. d) Range has no impact on payload performance. e) Payload and range are independent variables. f)

10:44 2 0 till 53% Module 4 The worksheet "Module 4" contains a subset of data from Module 4 focusing on counties in the state of Illinois. Follow the directions below to analyze the data, recording your answers in the corresponding answer blank in Column I (the yellow cells). Module 4.1 Use the SKEW.P formula (like VAR.P and STDEV.P above, we
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Statistics show that a basketball player with a "hot hand" who has made 5 shots in a row will be ________ likely to hit the next shot than if she had made 2 shots in a row. Group of answer choices just as likely less likely more likely

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