2) A random sample of 10 miniature Tootsie Rolls was taken froma bag. Each piece was weighed on a very accurate scale. The resultsin grams were:
3.087 3.131 3.241 3.241 3.270 3.353 3.400 3.411 3.437 3.477
-Assuming a normal population, use Minitab toconstruct a 95 percent confidence interval for the true meanweight. You will need to enter the data. Attach or include youroutput. (4 points)
-Write a sentence using the confidence interval found in part a.(3 points)
-Use Minitab to construct a histogram of the sample data. Usethe histogram to determine if the
assumption of normality is a valid assumption. State yourfindings. (4 points)
-What sample size would be necessary to estimate the true weightwith an error of ± 0.025 gram
with 90 percent confidence? (4 points)
