# Inference for Distributions

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A). Find the mean IQ scores for girls and for boys. It is common for boys to have somewhat higher scores on standardized tests. It that true?

b). Compute 95% T intervals of the Girls' IQ's and the Boys' IQ's and explain what these intervals mean.

c). Make a histogram for each set of data to determine whether each distribution is reasonably symmetric with no outliers. If this is so, we can use t- procedures-do your histograms indicate that we can use t-procedures?

d). Give a 90% 2-Sample T interval confidence for the mean difference between the mean IQ scores for all boys and girls in the district. Then explain what this interval means.

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a). Find the mean IQ scores for girls and for boys. It is common for boys to have somewhat higher scores on standardized tests. It that true?

b). Compute 95% T intervals of the Girls' IQ's and the Boys' IQ's and explain what these intervals mean.

c). Make a histogram for each set of data to determine whether each distribution is reasonably symmetric with no outliers. If this is so, we can use t- procedures-do your histograms indicate that we can use t-procedures?

d). Give a 90% 2-Sample T interval confidence for the mean difference between the mean IQ scores for all boys and girls in the district. Then explain what this interval means.

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