True/False
TABLE 8-2
A quality control engineer is interested in the mean length of sheet insulation being cut automatically by machine.The desired mean length of the insulation is 12 feet.It is known that the standard deviation in the cutting length is 0.15 feet.A sample of 70 cut sheets yields a mean length of 12.14 feet.This sample will be used to obtain a 99% confidence interval for the mean length cut by machine.
-True or False: Referring to Table 8-2,the confidence interval is valid only if the lengths cut are normally distributed.
Correct Answer:
Verified
Correct Answer:
Verified
Q46: TABLE 8-4<br>The actual voltages of power packs
Q49: A university system enrolling hundreds of thousands
Q129: TABLE 8-11<br>A poll was conducted by the
Q131: TABLE 8-7<br>A hotel chain wants to estimate
Q131: True or False: The confidence interval estimate
Q133: TABLE 8-6<br>After an extensive advertising campaign,the manager
Q136: As an aid to the establishment of
Q138: TABLE 8-6<br>After an extensive advertising campaign,the manager
Q139: TABLE 8-3<br>To become an actuary,it is necessary
Q186: The head librarian at the Library of