Attached is the formula sheet that will be provided

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measures of spread we’ve talked about in class. Attached is the formula sheet that will be provided with the exam. Formulas Central Tendency Arithmetic mean ࠵? = ࠵? ! ࠵? ! ! ! ! Expected value ࠵? ࠵? = ࠵? ! ࠵? ! ! ! ! ! Proportion ࠵? = ࠵?࠵?࠵?࠵?࠵? ࠵?࠵?࠵?࠵?࠵? Spread Standard deviation ࠵? = ࠵? ! ࠵? ! ࠵? 1 ! ! ! ! Standard error of the mean ࠵?࠵? = ࠵? / ࠵? Confidence interval [ ࠵? ࠵? ࠵?࠵? , ࠵? + ࠵? ࠵?࠵? ] Common quantiles 90% ࠵? = 1 . 64 95% ࠵? = 1 . 96 99% ࠵? = 2 . 80 Percentile ࠵? ! = ࠵? ࠵? + 1 !"
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