A research analyst is examining a stock for possible inclusion
in his client's portfolio. Over a 10-year period, the sample mean
and the sample standard deviation of annual returns on the stock
were 35% and 13%, respectively. The client wants to know if the
risk, as measured by the standard deviation, differs from 30%. Use
Table 3.
a.
Construct the 95% confidence intervals for the population
variance and the population standard deviation. (Round your
answer to 2 decimal places.)...