The average waist size forteenage males is 29 incheswith a standard deviation of 2inches.lf waist sizes arenormally distributed,determine the z-score of ateenage male with a 33 inch* waist1-2-1 O

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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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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 127.3-cm and a standard deviation of 1.7-cm.Find the proportion of steel rods with lengths between 130.7 cm and 132.2 cm.Enter your answer as a number accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
The average waist size for teenage males is 29 inches with a standard deviation of 2 inches. If waist sizes are normally distributed, determine the z-score of a teenage male with a 33-inch waist.
The scores of adults on an IQ test are approximately Normal with mean 100 and standard deviation 15. Find the top 10% of the scores (2 decimal points) and IQ score of top 10% (1 decimal point).
A mandatory competency test for high school sophomores has a normal distribution with a mean of 410 and a standard deviation of 104. Round the final answers to the nearest whole number and intermediate z-value calculations to 2 decimal places. The top 2% of students receive $500. What is the minimum score you would need to receive this award?
On a recent quiz, the class mean was 71 with a standard deviation of 3.9. Calculate the z-score (to 4 decimal places) for a person who received score of 80. Z-Score: Is this unusual? Unusual Not Unusual
the average height on the soccer team is 66 inches with a standard deviation of 3. a z score of -1.6 corresponds with how many inches?
Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the Z-Score of a man 62.8 inches tall. (to 2 decimal places)
Weights of incoming college freshmen are normally distributed with a mean of 150 lbs. and a standard deviation of 25 pounds. What z-score and what weight represents the first quartile for incoming freshmen?
Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 66.3 inches tall. (to 2 decimal places)
Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 61.1 inches tall. (to 2 decimal places)
Head circumferences of some males have a bellshaped distribution with a mean of 57 centimeters and a standard deviation of 3 centimeters. What is the variance of head circumferences of adult males?
A radio station claims that the amount of advertising each hour has a mean of 17 minutes and a standard deviation of 1.7 minutes. You listen to the radio station for 1 hour and observe that the amount of advertising time is 7 minutes. Calculate the z-score for this amount of advertising time.

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The average waist size for teenage males is 29 inches with a standard deviation of 2 inches.lf waist sizes are normally distributed, determine the z-score of a teenage male with a 33 inch * waist 2 O 1 O -2 -1 O