The table shows the results of a survey of college students. Find the probability that a student’s first class of the day is a h
umanities class, given the student is male. Round to the nearest thousandth.
Male Female
Humanities 70 80
Science 50 80
Other 60 70
A. 0.171
B. 0.467
C. 0.269
D. 0.389
Male Female
Humanities 70 80
Science 50 80
Other 60 70
A. 0.171
B. 0.467
C. 0.269
D. 0.389
2 answers:
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Answer: (751.05, 766.95)
Step-by-step explanation:
We know that the confidence interval for population mean is given by :-
,
where =population standard deviation.
= sample mean
n= sample size
z* = Two-tailed critical z-value.
Given :
n= 42
We know that from z-table , the two-tailed critical value for 99% confidence interval : z* =2.576
Now, the 99% confidence interval around the true population mean viscosity :-
∴ A 99% confidence interval around the true population mean viscosity : (751.05, 766.95)