For a random sample of 36 Alameda County kindergarten classes, the average class size was 25 with a standard deviation of two. a. Calculate and report a 99% confidence interval for the mean kindergarten class size in Alameda County. b. Terry Teacher suspects that kindergarten class sizes in Alameda county are larger than average. According to the California Department of Education, the average kindergarten class size in California is 21.9. Given the confidence interval you calculated in part (a), is Terry's suspicion is accurate? Explain why or why not.

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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.