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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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.)
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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
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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
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