Answer:
Step-by-step explanation:
The confidence interval for population mean is given by :-
, where n=sample size
= sample mean
=sample standard deviation
= critical t-value (for two tailed )
Let be the confidence interval for the population mean mercury concentration.
As per given , we have
Sample size : n= 28
degree of freedom = 27 [df=n-1]
Sample mean : cc/cubic meter
Sample standard deviation : s= 0.0036
Significance level :
Critical two-tailed test value :
(Using t-distribution table.)
We assume the population is approximately normal.
Now, the 98% confidence interval for the population mean mercury concentration will be :-
Required confidence interval :
Answer:
i dk
Step-by-step explanation:
i am unable to can answer this i neeed points
Is this the expression to simplify?
You have to subtract $40 from $68 make sure the larger number is in the front. If you did that all you would get $28.
Answer:
would need to see the graph
Step-by-step explanation:
see answer advice