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theuniicorntamer
23.07.2019 •
Mathematics
Assume that the heights of men are normally distributed with a mean of 69.0 inches and a standard deviation of 2.8 inches. if 64 men are randomly selected, find the probability that they have a mean height between 68 and 70 inches.
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Ответ:
0.9958
Step-by-step explanation:
We assume that the heights of men are normally distributed with
Mean :![\mu=69.0\text{ inches}](/tpl/images/0124/8537/c8cf9.png)
Standard deviation :![\sigma=2.8\text{ inches}](/tpl/images/0124/8537/0836c.png)
Sample size :![n=64](/tpl/images/0124/8537/74b4d.png)
The value of z-score is given by:
Let x be the height of the randomly selected men.
For x= 68
For x= 70
Now, the probability that they have a mean height between 68 and 70 inches is given by :-
Hence, the probability that they have a mean height between 68 and 70 inches = 0.9958
Ответ:
did you fin dout what it was lol i need it