Question

Mean breaking strength of a brand of thread is 500grms with standard deviation 40grms.
From the new supplies received last month, a sample of 16 threads was tested which
showed a mean strength of 450 grms. Can we conclude that the treads received are
inferior? (a= .05) (Z tabulated=-1.645)
Framing of Hypothesis
3 marks
Analysis
7 marks
Interpretation and result
5 marks​

Answer 1

Explanation:

What do you wanna ask please try to explain your question correctly