9) A group of 40 students in an English class is given a paragraph and asked to memorized as muchas possible. Their retention is then measured on a scale from 1 to 99. The contention being testedis that the average student will score 70 on the scale with a standard deviation of 11.62. it isassumed that the distribution of scores is normal. This grouped scores a mean of 66.93. Using the0.10 level of significance, does this result prove contention?Solution:I.Statement of the Hypothesis:Но:H1II.Statistical Test:III.Level of Significance and Critical Value:IV.Computed value of Z:V.Conclusion:

Answered: Image /qna-images/answer/ff069c2d-4b4a-491f-9e99-09920b4fee65.jpg

Answered: 9) A group of 40 students in an English…

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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Two students were informed that they received standard z-scores of 0.9 and -0.5, respectively on a multiple-choice examination in Science. If their grades were 95 and 60, respectively, find the mean and standard deviation of the examination grades.
Logan and Brian began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Logan took a test in Art History and earned a 76.8, and Brian took a test in English and earned a 68.9. Use the fact that all the students' test grades in the Art History class had a mean of 71.9 and a standard deviation of 11.6, and all the students' test grades in English had a mean of 61 and a standard deviation of 9.4 to answer the following questions.a) Calculate the z-score for Logan's test grade.z=z= [Round your answer to two decimal places.] b) Calculate the z-score for Brian's test grade.z=z= [Round your answer to two decimal places.]c) Which person did relatively better? Logan Brian They did equally well.
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The time is takes a studen to walk from the dorn to the chemistry lab follows roughly a Normal distrubtion with a mean of 20 minutes and a stardard deviation of 3 minutes. What porportion of students is faster than 15 minutes when walking from the dorm to the chemistry lab?
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Suppose the scores of students on a Statistics course are Normally distributed with a mean of 400 and a standard deviation of 42. What percentage of the students scored between 316 and 400 on the exam? (Give your answer to 3 significant figures.) percent.
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