The graph illustrates the distribution of test scores taken by College Algebra students. The maximumpossible score on the test was 130, while the mean score was 80 and the standard deviation was 10.5060708090100110Distribution of Test ScoresWhat is the approximate percentage of students who scored between 70 and 80?34What is the approximate percentage of students who scored between 60 and 100 on the test?95What is the approximate percentage of students who scored between 80 and 110 on the test?49.85What is the approximate percentage of students who scored higher than 100 on the test?

According to the empirical rule, for a Normal distribution with mean μ and standard deviation σ, 68%…

Answered: The graph illustrates the distribution…

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 standard deviation on your last test was 10. The average was a 70. The distribution had a normal shape (symmetrical with only one hump). Half of the people scored 70 or below. What percentage of your class scored between 60 and 80?
On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90, what was his z-score?
Lara wants to know if the number of words on a page in her English book is generally more than the number of words on a page in her history book. She takes a random sample of 25 pages in each book, then calculates the mean, median, and mean absolute deviation for the 25 samples of each book.
The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 120, while the mean score was 80 and the standard deviation was 9.What is the approximate percentage of students who scored between 80 and 89 on the test?%What is the approximate percentage of students who scored between 53 and 80 on the test?%What is the approximate percentage of students who scored between 62 and 98 on the test?%What is the approximate percentage students who scored between 71 and 89 on the test?%
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Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the range, variance, and standard deviation for the sample data. Given that these are the top 10 salaries, do we know anything about the variation of salaries of TV personalities in general? 42 41 39 31 23 21 18 17 16.8 16.1 O The range of the sample data is $ million. (Type an integer or a decimal.) The variance of the sample data is (Round to two decimal places as needed.) The standard deviation of the sample data is $ (Round to two decimal places as needed.) million Is the standard deviation of the sample a good estimate of the variation of salaries of TV personalities in general? O A. No, because there is an outlier in the sample data. B. Yes, because the sample is random. C. No, because the sample is not representative of the whole population. O D. Yes, because the standard deviation is an unbiased estimator. Next
Suppose that you are conducting a survey on how many pets each employee has in his or her household. The mean number of pets is 12 per household, and the standard deviation is 4. Rob only owns cats, and he has 8 cats. Which of the following statements is true? Select the correct answer below: The number of pets owned by Rob is 1 standard deviations to the left of the mean. The number of pets owned by Rob is 1 standard deviations to the right of the mean. The number of pets owned by Rob is 2 standard deviations to the left of the mean. The number of pets owned by Rob is 2 standard deviations to the right of the mean.
The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 130, while the mean score was 70 and the standard deviation was 14. 28 42 56 70 84 98 112 Distribution of Test Scores What is the approximate percentage of students who scored higher than 112 on the test? What is the approximate percentage of students who scored less than 42 on the test? What is the approximate percentage students who scored between 56 and 84 on the test? What is the approximate percentage of students who scored between 56 and 70? Question Help: D Video 1 D Video 2 Submit Question bp C
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The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 120, while the mean score was 72 and the standard deviation was 10. 42 52 62 72 82 92 102 Distribution of Test Scores What is the approximate percentage of students who scored lower than 42 on the test? Round to two decimal places. What is the approximate percentage of students who scored between 72 and 102 on the test? Round to two decimal places. What is the approximate percentage of students who scored between 52 and 92 on the test? Round to the nearest percent What is the approximate percentage students who scored between 62 and 82 on the test? Round to the nearest percent.

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