Consider the following sample of values for the quarterly rate of return on a particular common stock investment: 4.8 2.8 9.9 7.6 9.5 6.0 8.4 -5.0 The variance of the quarterly rate of return may be...

Consider the following sample of values for the quarterly rate of return on a particular common stock investment:



4.8   2.8   9.9   7.6

9.5   6.0   8.4   -5.0



The variance of the quarterly rate of return may be viewed as a measure of uncertainty for the common stock investment. Construct a 95% confidence interval for the true variance σ2.

(Note: from the sample data, s2 = 23.78).