14 marks 4.
14 marks
Diagram NOT
accurately drawn
36°
R
С
Р
Q
P. Q, R and S are points on a circle, centre C.
PCR is a straight line.
Angle PRS = 36
Calculate the size of angle RQS.
Give a reason for each step in your working.

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).