(Solved): 7. A manufacturer of sports equipment has developed a new synthetic fishing line that the company c ...
7. A manufacturer of sports equipment has developed a new synthetic fishing line that the company claims has a mean breaking strength of 8 kilograms with a standard deviation of 0.5 kilogram. Test the hypothesis that ?=8 kilograms against the alternative that ??=8 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.