Question

A test of the breaking strength of 6 ropes manufactured by a company
showed a mean breaking of and a standard deviation of s=150N, whereas
the manufacturer claimed a mean breaking strength of 8000N .Against the
alternative that it is less .Can we support the manufacturer’s claim at a level
of significance

Answer 1

Answer:

RESULTS: The study revealed that a 1% increase in access to improved sanitation would reduce infant mortality by a rate of about two infant deaths per 1000 live births.