A) Test at 5% level individually if the mean percentage for each of the means is different from 10%.

countries	sample size	sample mean	sample standard deviation
brazil	n1=20	3.464294243	1.955414704
russia	n2=20	0.555334519	0.275727133

B) Obtain a 95% confidence interval for the difference of means for the two countries.

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

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orchestra answered 1 year ago

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