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A study was performed to examine the habits of smokers, Of the 40 smokers surveyed average=...

A study was performed to examine the habits of smokers, Of the 40 smokers surveyed average= 22.0 cigarettes a day, standard deviation = 10.8 cigarettes a day. Use these sample statistics to test whether or not the population mean differs from 20 cigarettes (1 pack) a day.

a) Identify the population, variable, and parameter.

b) Does the CLT hold?

c) State the hypothesis:

Null h0: =

Alt: hA:   

d) calculate test statistic

e) find p-value range

df= p > p

p-value interpretation

f) make decision at .05 significance level and write conclusion

Math   Statistics-And-Probability   
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