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Author Question: The age of customers for a particular retail store follows a normal distribution with a mean of 37.5 ... (Read 71 times)

anshika

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on: Jun 24, 2018
The age of customers for a particular retail store follows a normal distribution with a mean of 37.5 years and a standard deviation of 7.6 years. What is the probability that the next customer who enters the store will be between 40 and 45 years old?

Question 2

The average SAT score for the 300 students accepted at Tiny College this year is 1050 with a standard deviation of 275 . If a random sample of 40 students is selected from this class, what is the probability that the average SAT score will be greater than 1000?


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abro1885

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Reply #1 on: Jun 24, 2018
Answer to Question 1

0.2096

Answer to Question 2

0.8907


anshika

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Reply 2 on: Jun 24, 2018
Wow, this really help

xiazhe

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Reply 3 on: Yesterday
Excellent

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