A-5. In a recent survey of families, it was found that the average amount of money spent on entertainment each week was normally distributed with a mean of £95.25 and a standard deviation of £27.32. What is the probability that the average spending of a sample of 25 randomly-selected families will exceed £102.50? A. 0.0918 B. 0.4082 C. 0.1064 D. 0.3936
A-5. In a recent survey of families, it was found that the average amount of money spent on entertainment each week was normally distributed with a mean of £95.25 and a standard deviation of £27.32. What is the probability that the average spending of a sample of 25 randomly-selected families will exceed £102.50? A. 0.0918 B. 0.4082 C. 0.1064 D. 0.3936
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Transcribed Image Text:A-5. In a recent survey of families, it was found that the average amount of money spent on
entertainment each week was normally distributed with a mean of £95.25 and a standard
deviation of £27.32. What is the probability that the average spending of a sample of 25
randomly-selected families will exceed £102.50?
A. 0.0918
B. 0.4082
C. 0.1064
D. 0.3936
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