A repairman charged $93.06. The price included 2 hours of labor and a $40 service charge.
2 answers:
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Answer: 59.342
Step-by-step explanation:
The chi-square critical values are used to find the confidence interval for σ.
Left critical value = [i.e. chi-square value from chi-square table corresponding to degree of freedom n-1 and significance level of
]
To find : left critical value for 95% confidence interval for σ with n = 41.
Significance level :
degree of freedom = 41-1=40
Now, the left critical value for 95% confidence interval for σ with n = 41 is the chi-square value corresponding to degree of freedom n-1 and
=59.342 [from chi-square table ]