Question

# Assume the sample is from a normally distributed population and construct the indicated confidence intervals for (a) the population variance σ2 and (b

Confidence intervals

Assume the sample is from a normally distributed population and construct the indicated confidence intervals for (a) the population variance $$\sigma$$;2 and (b) the population standard deviation$$\sigma$$;. Interpret the results. The acceleration times (in seconds) from 0 to 60 miles per hour for 33 randomly selected sedans are listed. Use a 98% level of confidence.
6.5 5.0 5.2 3.3 6.6 6.3 5.1 5.3 5.4 9.5 7.5

4.5 5.8 8.6 6.9 8.1 6.0 6.7 7.9 8.8 7.1 7.9

7.2 18.4 9.1 6.8 12.5 4.2 7.1 9.9 9.5 2.8 4.9