Could I get some help with this? I'm having a lot of trouble understanding confidence intervals and margins of error.

Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 5 inches. The heights of 7 randomly selected students are 63, 67, 64, 70, 70, 68 and 73. a = Ex: 12.34 Margin of error at 90% confidence level = Ex: 1.23 90% confidence interval = [ Ex: 12.34 Ex: 12.34 [smaller value, larger value] 2 Check Next