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AutumnJoy12
26.10.2020 •
Mathematics
A sample of size 49 is randomly selected from a population with a mean, 25 and standard deviation, 14. Find P(X-bar > 26)
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Ответ:
P(X>26)=0.4721
Step-by-step explanation:
Standard deviation =![\sigma = 14](/tpl/images/0840/2334/4d6d8.png)
No. of observations = n = 49
We are supposed to find![P(\bar{X} 26)](/tpl/images/0840/2334/e51ad.png)
Refer the Z table for p value
P(X<26)=0.5279
P(X>26)=1-P(X<26)=1-0.5279=0.4721
Hence P(X>26)=0.4721
Ответ: