Using the data in Exercise 1 and using a 0.05 level of significance, test the null hypothesis that the population sampled has a mean of μ XXXXXXXXXXUse a two-tailed alternative. Exercise 1 From...

Using the data in Exercise 1 and using a 0.05 level of significance, test the null hypothesis that the population sampled has a mean of μ 5 171. Use a two-tailed alternative.

Exercise 1

From extensive research it is known that the population of a particular species of fish has a lengths with a standard deviation σ = 44 mm. The lengths are known to have a normal distribution. A sample of 100 fish from such a population yielded a mean length y = 167 mm. Compute the 0.95 confidence interval for the mean length of the sampled population. Assume the standard deviation of the population is also 44 mm.