One tail or two tail test and why. Null and alternative hypotheses. Type of test and...

One tail or two tail test and why.
Null and alternative hypotheses.
Type of test and why.
Critical values at .05 and .01 levels. Include df, if needed.
Compute test
Accept or reject null (Remember to include level if reject.)
English conclusion (as we do in class).

16. People are selected to serve on juries by randomly picking names from the list of registered voters. The average age for registered voters in the country is μ = 39.6 years. A statistician randomly selects a sample of n = 16 people who are currently serving on juries. The average age for the sample is M = 48.9 years with a standard deviation = 12.4 years. Is the mean age of this sample significantly different than the mean age for registered voters? (18 points)

Set up as a formal inferential proof.
Calculate the point estimate for the mean of the population.

Calculate the 99% confidence interval for the mean of the population

Solutions

Expert Solution

At 0.05 level of significance,

ii) At 0.01 level of significance,

iii)

orchestra answered 1 year ago

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