Which of the following best describes a lens galaxy? O A group of stars that serve as a quick reference to different parts of the sky

O Several billion stars arranged in a disc shape that has uneven edges

O Millions of planets arranged in the shape of a disk with spiraling arms

O Billions of stars arranged in a circular pattern with a flattened core

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).