Confidence Intervals & Hypothesis Testing In this assignment you will use sample

Question

Confidence Intervals & Hypothesis Testing In this assignment you will use sample statistics to infer characteristics about populations. First, you will estimate a population parameter using a sample statistic and determine the level of precision of your estimate using a confidence interval. Next, you will develop hypotheses about a population parameter and use information acquired from a sample to conduct a test of significance to determine whether certain claims are valid. You will complete all questions by hand (i.e., no computer necessary). Your responses should be scanned to a pdf and saved as lastname Assign09.pdf

Explanation / Answer

here std error =std deviation/(n)1/2 =6/(26)1/2 =1.1767

hence test stat t=(X-mean)/std error =(52.7-50)/1.1767 =2.2945

for 25 degree of freedom and 0.05 level of significance ; crtiical value of t=2.0595

as test stat falls into critical region we should reject the null hypothesis and conclude that map std should not be believed

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