Quiz: Mastery Quiz: Chapters 5- 6 Time Limit: 01:15:00 Submit Quiz This Question
ID: 3333800 • Letter: Q
Question
Quiz: Mastery Quiz: Chapters 5- 6 Time Limit: 01:15:00 Submit Quiz This Question: 1 pt 13 of 151 complete) | This Quiz: 15 pts possible A survey indicates that shoppers will stay in a store for an average of 45 minutes with a standard deviation of 10 minutes. The lengths of time are normally distributed. What is the probability that a shopper wil spend more than 35 minutes in a store? The probability that a shopper wil spend more than 35 minutes in a store is (Type a probability rounded to 3 decimal places.)Explanation / Answer
Mean is 45 and s is 10. z is given as (x-mean)/s
P(x>35)= P(z>(35-45)/10)=P(z>-1) or 1-P(z<1)
from the normal distribution table we get 1-0.8413=0.1587
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