2. A manufacturer of sports equipment has developed a new synthetic fishing line that he claims has a mean breaking strength of 8 kilograms with standard deviation of 0.5 kilogram. Test the hypothesis...

2. A manufacturer of sports equipment has developed a new synthetic fishing line that he claims has a mean breaking strength of 8 kilograms with standard deviation of 0.5 kilogram. Test the hypothesis that
u = 8 kilograms against the alternative that
u is not equal to8 kilograms if a random sample of 50 lines is tested and found to have a mean breaking

strength of 7.8 kilograms. Use a 0.01 level of significance