Answer:
(-0.507,0.406)
Step-by-step explanation:
The online normal variable generator gave the following data set with n = 20
-0.42,-0.74,-1.54,1.16,1.19,0.32,-0.63,0.95,-1.8,1.49,0.02,0.7,0.56,-1.28,0.16,-0.05,0.28,-0.82,1.25,-1.81
For a normally distributed data,
Mean = 0 and Standard deviation = 1
Formula:
where are data points, is the mean and n is the number of observations.
Mean =
Standard Deviation, =
Confidence interval =
At 95%,
Putting all the values, we get the confidence interval as: