Question 1112397
Assume that z is the test statistic.
(a) Ho: μ = 22.5, Ha: μ > 22.5; x = 24.1, σ = 7, n = 23 
(i) Calculate the test statistic z. (Give your answer correct to two decimal places.) 


(ii) Calculate the p-value. (Give your answer correct to four decimal places.) 


(b) Ho: &#956; = 200, Ha: &#956; < 200; x = 193, &#963; = 38, n = 36 
(i) Calculate the test statistic z. (Give your answer correct to two decimal places.)
z(193) = (193-200)/(38/sqrt(36)) = -1.0526
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(ii) Calculate the p-value. (Give your answer correct to four decimal places.) 
p-value = P(z < -1.0526) = normalcdf(-100,-1.0526) = 0.135
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Use the same procedure on the following problem.
Cheers,
Stan H.
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(c) Ho: &#956; = 12.4, Ha: &#956; 12.4; x = 10, &#963; = 5, n = 38 
(i) Calculate the test statistic z. (Give your answer correct to two decimal places.) 


(ii) Calculate the p-value. (Give your answer correct to four decimal places.)