Suppose your firm has been experimenting with two different physical arrangement
ID: 3127611 • Letter: S
Question
Suppose your firm has been experimenting with two different physical arrangements of its assembly line. It has been determined that both arrangements yield the same average number of finished units per day. To obtain greater process control, you suggest that the arrangement with the smaller variance in the number of finished units per day be permanently adopted. Two independent random samples yield the results shown in the table
Assembly Line 1
Assembly Line 2
n1=21 days
n2=21 days
s1=60
s2=35
Select one:
A. c2 = 31.410
B. t = 1.725
C. F = 2.46
D. F = 2.12
Assembly Line 1
Assembly Line 2
1 = 85
2 = 87
n1=21 days
n2=21 days
s1=60
s2=35
Explanation / Answer
The suitable rejection region will be one corresponding to test statistic t. Since, sample size, sample mean and sample standard deviation of two samples are known, t test statistic is appropriat eto comapre the difference in means. Answer B.
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