A teacher informs her psyhcology class (of 500+ students) that a test was very difficult, but the gradeswould be curved. Scores on the test were normally distributed with a mean of 45 and a standard deviationof 6.9. The maximum possible score on the test was 100 points. Because of partial credit, scores wererecorded with 1 decimal point accuracy. (Thus, a student could earn a 45.2, but not a 44.43.)The grades are curved according to the following scheme. Find the numerical limits for each letter grade.LetterSchemeIntervalA.Top 8%Scores above the bottom 71%and below the top 8%Scores above the bottom 29%and below the top 29%Scores above the bottom 8%and below the top 71%FBottom 8%

The standard normal variate is used to measure the deviation of observation from the standard…

Answered: A teacher informs her psyhcology class…

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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Use z scores to compare the given values. The tallest living man at one time had a height of 238 cm. The shortest living man at that time had a height of 142.4 cm. Heights of men at that time had a mean of 175.45 cm and a standard deviation of 5.59 cm. Which of these two men had the height that was more extreme? ... Since the z score for the tallest man is z = 0 and the z score for the shortest man is z = the man had the height that was Im- more extreme. (Round to two decimal places.) shortest tallest
In the School of Medicine at Florida State University, the mean IQ is 116 with a standard deviation of 14. Given this information, what IQ score would correspond to a z-score of -1.5? 123 118 104 95
Neil scored 67 on his calculus class final and was devastated by his failing grade. His class distribution had a mean of 54 and a standard deviation of 7. Greg was quite proud of his score of 88 for his Spanish language class. His class distribution had a mean of 97 with a standard deviation of 6. Who did better relative to their class?
Tom scored a 115 on a measure of math ability and a 40 on a measure of verbal ability. The means and standard deviations on the measure of math ability and verbal ability are M = 95, s = 15 and M = 35, s = 2.95, respectively. In which area did Tom do better?
Suppose the scores on your last Algebra 2 test were normally distributed, with a mean of 81% and a standard deviation of 3%. To show you how you compared to your classmates, the teacher did not record your grades as per- centages, instead, she wrote them as z-scores. You look at your paper and see "2.66" written at the top. What was your score as a percentage? Explain how you determined your answer.
An incoming MBA student took placement exams in economics and mathematics. In economics, she scored 82 and in math 87. The overall results on the economics exam had a mean of 71 and a standard deviation of 7, while the mean math score was 69, with a standard deviation of 10. On which exam did she do better compared with the other students? Since she scored standard deviations V the mean in economics and standard deviations V the mean in mathematics, she did better on the exam. (Round to two decimal places as needed.)
The mean score for first exam in your first organic chemistry class (section A) was 60, with a standard deviation of 5. Your score on the exam was 70. A. How many standard deviations above the mean is your score?
A doctor in the oncology department of a hospital surveyed the breathing rate of cancer patients. The mean and standard deviation of breathing rates for a group of patients are 12 and 2.3 breaths per minute, respectively.Find the proportion of the patients having breathing rates from 7.4 to16.6 breaths per minute.
The average of the final exam grades of a course attended by four hundred students is calculated as 60 points and the standard deviation as 15 points. A letter grade will be given to those who score 80 and above in the exam. What is the rate of 0 and above and how many people can be estimated to get A?
Adrianna is trying to figure out the sample size for the data set she wants to collect. She thinks the population standard deviation could be as low as 120 or as high as 136. Explain to Adrianna the impact standard deviation will have on her sample size.
Suppose that the mean and standard deviation for vertical jump scores are 40 and 6 cm respectively. A York student jumps 52 cm on the vertical score. Translate the student’s jump into a z-score.

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