Q2. It is a simple random sample, and it is normal, confidence level is 95%. Listed below are 6 lengths (in minutes) of randomly selected movies. XXXXXXXXXX136 a) Find the sample standard deviation....

Q2. It is a simple random sample, and it is normal, confidence level is 95%.
Listed below are 6 lengths (in minutes) of randomly selected movies.
110 96 125 94 132 136
a) Find the sample standard deviation.
b) Find the margin of error using the 95% confidence level.
c) Construct a 95% confidence interval estimate of the mean length of all movies.