T8510
5) adele went to the post office to buy regular stamps and postcards stam
she bought a total of 25 stamps, some 39-cent stamps and the rest 23-cent postcard stamps.
if she paid $8.47 altogether, how many 39-cent stamps did she buy?

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).