Hello everyone, I tried
calculating using t and z score and didn't get the answer.
Solution: We are required to find the 95% confidence interval for the population mean.
The 95% confidence interval for the population mean is:
Where:
is the sample mean of given 5 observations
is the critical value at 0.05 significance level for
is the sample standard deviation of given 5 observations
is the number of individuals in the given sample
Therefore, the 95% confidence interval for the population mean
is
But none of the given options is what we got.
There is a mistake with the given correct answer
.
Let me explain it:
The answer given above has been calculated using the below formula:
So using the formula
, we got exactly what has been shown the correct answer. But the
formula used is wrong because they have forgotten to divide
standard deviation by
. That is the reason you were unable to figure out the correct
answer.
Hope this helps!
Hello everyone, I tried calculating using t and z score and didn't get the answer. Question...