In: Statistics and Probability
Assume that the heights of the bookcases are normally distributed. A random sample of 19 bookcases in one company have a mean height of 68.5 inches and a standard deviation of 2.9 inches. Test the claim that the SD of the heights of the bookcases is less than 3.0 inches. Use Alpha .01
Answer---->>
Here Critical value calculate from chi-square distribution table.
conclusion :-
There is insufficient evidence to conclude that the standard deviation of of the heights of the bookcases is less than 3 inches