You randomly select and measure the contents of bottles of cough syrup. The results​ (in fluid​ ounces) are shown to the right 4.211 4.298
4.258
4.242
4.182
4.243
4.266
4.243
4.226
4.234
Assume the sample is taken from a normally distributed population. Construct ​90% confidence intervals for​ (a) the population variance and​ (b) the population standard deviation . Interpret the results.