The mean annual salary offer for a student graduating with adegree in accounting (in 2010) was $48,722.
Suppose that a randomly selected sample of 20 accounting graduatesshows an average salary offer of $49,850 with a standard deviationof $3300.
A. How many degrees of freedom are there for the tdistribution? Â
B. Assume that the population distribution is normal. What isthe value of the test statistic, t? Give your answer to two decimalplaces.
C. If we use a significance level of 0.05, what is the criticalvalue of t? (Hint: Use the attached table. Is this for a one-sidedor two-sided test?)Â Â
