Weschler Adult Intelligence scores (WAIS) is normal with a mean of 100 and population standard deviation 0f 15.  A sample of 9 from Lake Wobegon population is taken.  The following IQ scores were collected: {115, 138, 125, 129, 79, 99, 105, 116, 126}.  Test the claim that the populations scores at Wobegon is greater than 100 using 95% CI.

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.