A lifeguard watches as people arrive at the beach. A family is setting up an umbrella
shoreline. Directly in front of the family, in
away. Suddenly the surfer disappears under
the shortest distance the lifeguard needs to
and chairs 25 m away, down near the
the water, is a surfer approximately 60 m
the waves and does not resurface. What is
swim to reach the surfer?

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).