A lumber company is making doors that are 20580 millimeters

A lumber company is making doors that are 2058.0 millimeters tall. If the doors are too long they must be trimmed, and if the doors are too short they cannot be used. A sample of 9 is made, and it is found that they have a mean of 2044.0 millimeters with a standard deviation of 24.0. A level of significance of 0.05 will be used to determine if the doors are either too long or too short. Find the value of the test statistic. Round your answer to 3 decimal places. Assume the population is normally distributed. TEST STATISTIC Enter the value of the test statistic. Answer: (Round your answer to 3 decimal places.)

Solution

t=sample mean-assumed mean/s/sqrt(n-1)

t=-1.75