A lumber mill is tested for consistency by measuring the variance of board thicknesses. The target accuracy a variance of 0.0015 or less. If 22 measurements are taken and their variance is 0.006, is there
Enough evidence to reject the claim that her standard deviation is within the limit at ?
A) Yes, comparing the test value 84.00 and the critical value 38.93.
B) No, comparing the test value 18.33 and the critical value 38.93.
C) Yes, comparing the test value 84.00 and the critical value 40.29.
D) No, comparing the test value 18.33 and the critical value 40.29.

Question

A lumber mill is tested for consistency by measuring the variance of board thicknesses. The target accuracy a variance of 0.0015 or less. If 22 measurements are taken and their variance is 0.006, is there
Enough evidence to reject the claim that her standard deviation is within the limit at  ?
A) Yes, comparing the test value 84.00 and the critical value 38.93. 
B) No, comparing the test value 18.33 and the critical value 38.93. 
C) Yes, comparing the test value 84.00 and the critical value 40.29. 
D) No, comparing the test value 18.33 and the critical value 40.29.

Quizplus · Accepted Answer

The Answer of A lumber mill is tested for consistency by measuring the variance of board thicknesses. The target accuracy a variance of 0.0015 or less. If 22 measurements are taken and their variance is 0.006, is there
Enough evidence to reject the claim that her standard deviation is within the limit at  ?
A) Yes, comparing the test value 84.00 and the critical value 38.93. 
B) No, comparing the test value 18.33 and the critical value 38.93. 
C) Yes, comparing the test value 84.00 and the critical value 40.29. 
D) No, comparing the test value 18.33 and the critical value 40.29.

A Lumber Mill Is Tested for Consistency by Measuring the Variance