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Population Sample size Sample mean Sample Standard Deviation    One n=20 x1= 11.07 s1= 1.74    ...

Population Sample size Sample mean Sample Standard Deviation
   One n=20 x1= 11.07 s1= 1.74
    Two n=20 x2= 6.36 s2 = 1.50

a) Test at 5% level individually if the mean percentage for each Population is different from 10%.

b) Obtain a 95% confidence interval for the difference of means for the two populations.

c) Test an appropriate pair of hypotheses for the two means at 5% level of significance.

Math   Statistics-And-Probability   
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