A history teacher believes that students in an afternoon class score higher than the students in a morning class. The results of a special exam are shown below. Can the teacher conclude that the afternoon students have a higher score? Use α = 0.01.  Morning Students  Afternoon Students   n 1 = 36   n 2 = 41    1 = 90    2 = 93   s 1 = 5.8   s 2 = 6.3

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A: From given data we have : n=576 x=358

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Q: Given X = 45, ? ̅=52, and s = 8. Compute for the corresponding z-score.

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A:

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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.