H0 350 vs H1 350 are examined using a sample size of 20 w

H₀ : = 350 vs H₁: < 350 are examined using a sample size of 20 with mean=345 and standard deviation=13. What is the p-value of this test if we assume that the data is normal?

A 0.0427

B 0.9573

C 0.0508

D We don’t have enough information to answer

E None of the above

Solution

Here we will calculate z =xbar-mu/standar deviation/sqrt(n)=345-350/13/sqrt(20)=-1.7241

Using this we find pvalue and it is 0.042345

Hence answer is A.