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KaliBratz
02.07.2019 •
Mathematics
Trucks in a delivery fleet travel a mean of 120 miles per day with a standard deviation of 22 miles per day. the mileage per day is distributed normally. find the probability that a truck drives between 100 and 157 miles in a day. round your answer to four decimal places.
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Ответ:
0.7721
Step-by-step explanation:
Given : Mean :![\mu = 120\text{ miles}](/tpl/images/0041/0461/7ef09.png)
Standard deviation :![\sigma = 22\text{ miles}](/tpl/images/0041/0461/272c1.png)
The formula to calculate the z-score :-
For x= 100 miles
For x= 157 miles
The P-value :![P(-0.91](/tpl/images/0041/0461/9fcdd.png)
Hence, the probability that a truck drives between 100 and 157 miles in a day. = 0.7721
Ответ: