Use this information to construct the 90 and 95 confidence intervals for the. Remember in this section we already know the population standard deviation s. You can find the upper and lower bounds of the confidence interval by adding and subtracting the margin of error from the mean.
To find the MSE subtract your sample mean from each value in the dataset square the resulting number and divide that number by n 1 sample size minus 1.
Solution for You are given the sample mean and the population standard deviation. Subtract the error bound from the upper value of the confidence interval. Assuming the following with a confidence level of 95. Then add up all of these numbers to get your total sample variance s2.