The mean gross annual incomes of certiﬁed tack welders are normally distributed with the mean of
$50,000 and a standard deviation of $4,000. The ship building association wishes to ﬁnd out
Whether their tack welders earn more or less than $50,000 annually. The alternate hypothesis is
That the mean is not $50,000. When tested at the 99% level, these are the results found with
Megastat:
A) Since the p-value is 0.43 at this level of testing, there is insuﬃcient evidence to say that the welders earn an income different from $50,000.
B) Since the p-value is 0.43 at this level of testing, there is suﬃcient evidence to say that the welders earn more than $50,000.
C) The p-value of 0.043 indicates that there is suﬃcient evidence to say that the welders earn more than $50,000.

Question

The mean gross annual incomes of certiﬁed tack welders are normally distributed with the mean of
$50,000 and a standard deviation of $4,000. The ship building association wishes to ﬁnd out
Whether their tack welders earn more or less than $50,000 annually. The alternate hypothesis is
That the mean is not $50,000. When tested at the 99% level, these are the results found with
Megastat: 
A) Since the p-value is 0.43 at this level of testing, there is insuﬃcient evidence to say that the welders earn an income different from $50,000. 
B) Since the p-value is 0.43 at this level of testing, there is suﬃcient evidence to say that the welders earn more than $50,000. 
C) The p-value of 0.043 indicates that there is suﬃcient evidence to say that the welders earn more than $50,000.

Quizplus · Accepted Answer

Since the p-value is 0.43 at this level of testing, there is insuﬃcient evidence to say that

The Mean Gross Annual Incomes of Certiﬁed Tack Welders Are