Question
In: Statistics and Probability
Find the p-value for the hypothesis test. A random sample of size 50 is taken. The...
Find the p-value for the hypothesis test. A random sample of size 50 is taken. The sample has a mean of 375 and a standard deviation of 81.
H0: µ = 400
Ha: µ< 400
The p-value for the hypothesis test is .
Your answer should be rounded to 4 decimal places.
Solutions
Expert Solution
this is the left tailed test .
The null and alternative hypothesis is ,
H0 : 
= 400
Ha :
<400
Test statistic = z
= (
- 
) / 
/ 
n
= (375 - 400) / 81 /
50
Z= -2.18
P(z < -2.18) = 0.0146
P-value = 0.0146 ( using z table )
orchestra answered 1 year agoRelated Solutions
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