J /-2 + 7 = -12. what is the value of j
2 answers:
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Answer:
Step-by-step explanation:
Confidence interval for population mean is given by :-
(1)
, where = Sample mean
= Critical z-value
= Population standard deviation.
n= Sample size.
As per given , we have
n= 610
Significance level for 85% confidence :
By z-table critical two tailed z-value :
Put all values in (1) , we get
Hence, the 85% confidence interval for the mean consumption of meat among people over age 40. =