X2y3z - y3z2 – xyz2 + yz3

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).

Me i’m stuck on all these questions besides the two bottom ones

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x,y) coordinate plane?