Chapter 6: Q. 1 (page 385)
A bottle of water contains fluid ounces with a standard deviation of ounces. Define the random variable in words. ____________.
Short Answer
Ounces of water in the bottle
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Chapter 6: Q. 1 (page 385)
A bottle of water contains fluid ounces with a standard deviation of ounces. Define the random variable in words. ____________.
Ounces of water in the bottle
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What is the z-score of x= 9, if it is 1.5 standard deviations to the left of the mean?
In a normal distribution, x = –5 and z = –3.14. This tells you that x = –5 is ____ standard deviations to the ____ (right or left) of the mean.
According to a study done by De Anza students, the height for Asian adult males is normally distributed with an average of inches and a standard deviation of inches. Suppose one Asian adult male is randomly chosen. Let X = height of the individual.
a.
b. Find the probability that the person is between and inches. Include a sketch of the graph, and write a probability statement.
c. Would you expect to meet many Asian adult males over 72 inches? Explain why or why not, and justify your answer numerically.
Kyle’s doctor told him that the z-score for his systolic blood pressure is . Which of the following is the best interpretation of this standardized score? The systolic blood pressure (given in millimeters) of males has an approximately normal distribution with mean and standard deviation . If X = a systolic blood pressure score then .
a. Which answer(s) is/are correct?
b. Calculate Kyle’s blood pressure.
The length of time it takes to find a parking space at 9 A.M. follows a normal distribution with a mean of five minutes and a standard deviation of two minutes.
Based upon the given information and numerically justified, would you be surprised if it took less than one minute to find a parking space?
a. Yes
b. No
c. Unable to determine
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