In the 2018-2019 academic year, the mean graduation rateat 30 colleges was 64% and the standard deviation was 8%.Assume the distribution of graduation rates is unimodal andsymmetric.What percentage of the colleges would you expect to havegraduation rates between 56% and 72%? Select an answer OWhat percentage of the colleges would you expect to havegraduation rates between 48% and 80%? Select an answerWhat percentage of the colleges would you expect to havegraduation rates between 40% and 88%? Select an answer OIf someone guessed that the graduation rate in one of thecolleges was 35% would this number be consistent with thedata set?Select an answer

Answered: Image /qna-images/answer/193c0639-8518-4add-8954-4ef8d2b8f901.jpg

Answered: In the 2018-2019 academic year, the…

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 frequency of repair for the trucks owned by a trucking firm over a 5-year period has been tabulated. The results are shown in the following frequency distribution.
The average final exam score for the statistics course is 77%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is different. The final exam scores for the 13 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 77, 91, 64, 96, 96, 75, 74, 78, 84, 98, 78, 80, 74 What can be concluded at the the a = 0.10 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?✓ Select an answer ✓ H₁: ? Select an answer c. The test statistic ? ✓ = d. The p-value = e. The p-value is ? ✓ a f. Based on this, we should [Select an answer the null hypothesis. (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.)
The average house has 11 paintings on its walls. Is the mean larger for houses owned by teachers? The data show the results of a survey of 14 teachers who were asked how many paintings they have in their houses. Assume that the distribution of the population is normal. 12, 13, 12, 12, 12, 11, 13, 12, 13, 11, 10, 12, 11, 13 What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: Select an answer H1: Select an answer c. The test statistic ? ▼ (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is (? v f. Based on this, we should | Select an answer the null hypothesis. g. Thus, the final conclusion is that ... The data suggest the population mean is not significantly more than 11 at a = 0.05, so there is sufficient evidence to conclude that the population mean number of paintings that are in teachers' houses…
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