4. Tamia bought 3 sweaters that each
cost the same amount and 1 skirt that
cost $25. The items she bought cost a
total of $160 before tax was added.
What was the cost of each sweater?
A. $25
B. $35
C. $75
D. $45

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).