A random sample of stock prices per share (in dollars) is shown. Find the $80\%$ confidence intervals for the variance and standard deviation for the prices. Assume the variable is normally distributed. Round the sample variance and final answers to 3 decimal places.
60.5028.00 28.25 6.94
45.1213.62 53.81 3.81
43.0047.50 7.50 75.37
12.0028.37 13.88 26.69
[ ] $<\sigma^2<$ [ ]
[ ] $<\sigma<$ [ ]
60.50 | 28.00 | 28.25 | 6.94 |
45.12 | 13.62 | 53.81 | 3.81 |
43.00 | 47.50 | 7.50 | 75.37 |
12.00 | 28.37 | 13.88 | 26.69 |