Question 7Test scores were recorded for students in a statistics class. The scores for the first test had a standard deviation of 3.8 points. The scores from the second test had a standard deviation of 4.8 points. Choose the correct statement below.O The average test grade rose by 1 point.O The higher standard deviation of the second test indicates higher average scores on the second test than on the first test.O The scores of the second test were closer together than the first test.O The scores of the first test were closer together than the second test.O None of the above statements are true.1 pts

Central tendency is a measure of a variable that clusters around a central value that represents the…

Answered: Test scores were recorded for students…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Mr. Stant collected information on how much customers spend at Walmart and Target. He created the following histograms. Which of the statements must be true about the two data sets displayed? a The standard deviation of amounts spent at Walmart is less than the standard deviation of the amounts spent at Target. b The median amount spent at Walmart is equal to the median amount spent at Target. c The standard deviation of amounts spent at Walmart is more than the standard deviation of the amounts spent at Target. d The range of amounts spent at Walmart is equal to the range of amounts spent at Target. e The mean amount spent at Walmart is equal to the mean amount spent at Target.
The first statistics exam had a mean of 73 and a standard deviation of 15 points; the second had a mean of 83 and a standard deviation of 5 points. Anna scored a 82 on both tests. Megan scored 92 on the first exam and 7272 on the second. They both totaled 164 points on the two exams, but AnnaAnna claims that her total is better. Explain. Question content area bottom Part 1 The total of Anna's z-scores is enter your response here, which is greater than Megan's total of enter your response here. (Round to one decimal place as needed.)
Refer to the accompanying table, which describes the number of adults in groups of five who reported sleepwalking. Find the mean and standard deviation for the numbers of sleepwalkers in groups of five. E Click the icon to view the data table, The mean is sleepwalker(s). (Round to one decimal place as needed.) The standard deviation is sleepwalker(s). (Round to one decimal place as needed.) Table of numbers of sleepwalkers and probabilities P(x) 0.183 0.368 0.305 3 0.115 4. 0.025 0.004 Print Done Enter your answer in each of the answer boxes. a Speech Present.pptx 2 pecha kucha pr.pptx O Team Pecha Ku.docx ch4Bprac.pdf The Canaries pptx Show All MacBook Air 吕0 F3 esc F8 F9 F10 F1 F2 F5 F6 F7 @ #3 2$ & 3 7 8 Q W E Y U P T
Beth scored 88 on a nutrition test. The class mean was 81 and the standard deviation was 3.2. What is Beth's T-score? Group of answer choices 47.8 71.9 22.4 Beth's T-score cannot be calculated. Not enough information is provided.
The question is attached in an image.
The mean height of Americans in 1776 was 67 inches with a standard deviation of 3 inches. George Washington is believed to have been 6 ft 2 inches tall, or 74 inches. Between what two heights (in inches) do 68% of the heights fall? a.61 to 70 b.61 to 73 c.64 to 70
You scored a 85 on a stats test with a mean of 70 and a standard deviation of 7. Youalso score a 90 on a Bio test with a mean of 80 and a standard deviation of 8. Inwhich test did you score better, relative to the other test takers? What measure areyou using to answer this question?
You have a sample of 48 randomly selected Vancouverites. On average (the sample mean), the people in your sample spent 425 hours eating food in 2020. The least time a person in the sample spent eating food in 2020 is 367 hours and the most time a person in the sample spent eating food in 2020 is 484 hours. What would be your best guess about the population standard deviation of the time a Vancouverite spent eating food in 2020? Give the number and explain (including assumptions you make about the population distribution).
1. higher or lower 2. Slower or faster
Please see information below for the details of the question. It is asking for the z-score for Pepper. Chihuahuas have a mean weight of 5.2 pounds, with a standard deviation of 1.2 pounds. German Shepherds have a mean weight of 78 pounds, with a standard deviation of 15 pounds. Suzie’s Chihuahua, Rey, weighs 8.0 pounds. Noel’s German Shepherd, Pepper, weighs 47 pounds. What is the z-score for Pepper? Round your answer to 2 decimal places.
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Do students ever make up information for an assignment? You be the judge. Students in an applied psychology class were sent out to be observer 100 cars and report how many of the drivers wear wearing seat belts. Each student reported the number of drivers he or she saw wearing seat belts as his or her score. The mean for the class was 65, with the standard deviation of 7. One student, who had a reputation for not doing his assignments, reported seeing 42 belted drivers. Assuming the student actually counted, use the normal curve table to determine the probability that he observed 42 or fewer seat belt users. Based on this probability, do you suspect he made up the numbers rather than actually counting?

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