ECON-2136EL Study Guide - Final Guide: Skewness, Cumulative Distribution Function, Type I And Type Ii Errors

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What is the population standard deviation for the numbers: 75, 83, 96, 100, 121 and. What is the z score of 83? (75+83+96+100+121+125)/6 = 79. 83. Z score = x(score) mean / std. 83 79. 83 / 22. 04 = 0. 19 z table = 58% 95% of students at school weigh between 62 kg and 90 kg. Assuming this data is normally distributed, what are the mean and standard deviation: 68% of the marks in a test are between 51 and 64. Assuming this data is normally distributed, what are the mean and standard deviation: in the united states, the average iq is 100, with a standard deviation of 15. What percentage of the population would you expect to have an iq lower than 85? (this requires a z table) In the united states, the average iq is 100, with a standard deviation of. What percentage of the population would you expect to have an iq between 90 and.

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