1. An educator claims that the variation in the number of years of teaching experience of senior high school teachers is

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1 An Educator Claims That The Variation In The Number Of Years Of Teaching Experience Of Senior High School Teachers Is 1 (603.17 KiB) Viewed 19 times

1. An educator claims that the variation in the number of years of teaching experience of senior high school teachers is different than the variation in the number of years of teaching experience of elementary school teachers. Two groups are randomly selected. The variance of the number of years of teaching experience of 18 elementary teachers is 1.9, and the variance of the years of experience of 26 senior high school teachers is 2.8. a. (4 points) Construct a 95% confidence interval for the population standard deviation for each of the two groups. b. (1 point) Based on these confidence intervals, can you assume homogeneity of variance; why or why not? c. (3 points) Conduct a F-test to test homogeneity of variance; be sure to specify the null and alternative hypotheses in symbols and use a=0.05.