6. a student needs at least seven hours of sleep each night. the student goes to bed at 11: 00 pm and wakes up before 6: 30 am. a. is the student getting enough sleep? b. write an inequality for the number of hours of sleep the student gets each night.

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).