Solution:
This is a left tailed test,
a-1)
The test statistics,
Z =( - )/ (/n)
= ( 171 - 174 ) / ( 25 / 79 )
= -1.07
a-2)
P-value = P(Z < -1.07 )
= 0.1431
P-value 0.10
b)
P-value > 0.05, Fail to reject H0.
No, The P-value is greater than the significance level.
c)
P-value > 0.01 , Fail to reject H0.
No, The P-value is greater than the significance level.
d)
We can not conclude that the population mean is less than 174.
Consider the following hypotheses: Họ: H = 174 HA: u < 174 A sample of 79...
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