H. A mark of at least 50 is required to pass a course. The marks this year run from a low of 45 to ahigh of 83, with a mean of 64 and a standard deviation of 5. The professor would like all studentsto pass, so he adjusts the marks to achieve a mean of 7with a standard deviation of Is thisenough to ensure that all students will pass?HINT: With this type of a bell curve, everyone's z-score stays the same.31

Answered: Image /qna-images/answer/3bb26451-4e60-4bf5-a25f-ddb20a5cf784.jpg

Answered: H. A mark of at least 50 is required to…

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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If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: - 2.00, - 1.00, 0, 1.00, 2.00? Why? OA The z score of 1.00 is most preferable because it is 1.00 standard deviation above the mean and would correspond to an above average test score. O B. The z score of 0 is most preferable because it corresponds to a test score equal to the mean. OC. The z score of - 1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average test score. OD. The z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. O E. The z score of -2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. O Time MacBook PrO -> G Search or type URL esc ! @ #3 2$ % 2 4 6. 7 8 R Y P Q tab A S F G K caps…
ssume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15 (as on the Wechsler test). Find the following: The Z-value that separates the bottom 18% from the others. The Z-Value for the 95 percentile. What is the IQ score that separates the bottom 18% from the others? The 95 percentile is? A. 113.725 B. -.92 C. 75.325 D. -.915 E. 1.645 F. 86.275 G. 124.675 H. .915
Use z scores to compare the given values. The tallest living man at one time had a height of 225 cm. The shortest living man at that time had a height of 104.3 cm. Heights of men at that time had a mean of 173.55 cm and a standard deviation of 5.15 cm. Which of these two men had the height that was more extreme? Since the z score for the tallest man is z= and the z score for the shortest man is z= the V man had the height that was more extreme. (Round to two decimal places.)
CHALLENGE 4.2.2: z-scores. АCTIVITY Jump to level 1 New employees at a company are given a proficiency test. The test scores are approximately normally distributed with a mean of 300 and a standard deviation of 10. A new employee scores 307 on the exam. What is the employee's z-score? Ex: 2.9 Check Next Feedback?
Isabella's points per game of bowling are normally distributed with a standard deviation of 8 points. If Isabella scores 148 points, and the z-score of this value is 3, then what is her mean points in a game? Do not include the units in your answer. For example, if you found that the mean is 150 points, you would enter 150. Provide your answer below:
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
Scores on the Wechsler Adult Intelligence Scale for the 2020 to 3434 age group are approximately Normally distributed with a mean of 110 and a standard deviation of 15. How high must a person score to be in the top 5%5% of all scores? Enter your answer as a whole number.
Annual income: The mean annual income for people in a certain city (in thousands of dollars) is 41, with a standard deviation of 28. A pollster draws a sample of 92 people to interview. Answer the two following questions.
The quantitative subtest of the Graduate Record Exam (GRE) has a mean of 500 and a standard deviation of 100. What GRE score would correspond to a z score of 1.50? a. 600 b. 500 c. 340 d. 650
New employees at a company are given a proficiency test. The test scores are approximately normally distributed with a mean of 350 and a standard deviation of 30. A new employee scores 389on the exam. What is the employee's z-score?
By studying the standard deviation fomula, given below, explain why the standard deviation of a set of data will always be greater than or equal to 0. E(x-x)? n-1 O A. The mean, x, will always be greater than or equal to 0. O B. The values of x will always be greater than or equal to 0. OC. The values of x-x will always be greater than or equal to 0.

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