In a survey of 1,208 working Americans it was found that the mean amount of time they spend commuting one-way to work was 48 minutes with a standard deviation of 23 minutes. Construct a 99% confidence interval for the mean length of time Americans spend commuting to work.

17 in long 1.3 ft wide and 8in high what is the volume

What is the greater volume 72 quarts or 23 gallons

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e. g. 98.76543).