A ten year old survey found that the average income of sole proprietor CPA's was $74,914. To update this information, a new survey of 112 proprietor CPA's was taken and it showed a mean of $74,695. Use a 5% level of significance to test whether the average income sole proprietor CPA's has increased. Assume a population standard deviation of $14.530. Report the value. What is is your conclusion?© BrainMass Inc. brainmass.com June 4, 2020, 2:14 am ad1c9bdddf
Null hypothesis H0: mu<=$74,914
Alternative hypothesis Ha: mu>$74,914
Given xbar=74695, n=112, sigma=14530. ...
The solution reports the value for the average income of sold proprietor CPA.