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How many standard deviations away from the mean is a child whose time to the onset of seizure was 50 months? What proportion of children have an onset to seizure time of 50 or more months? What proportion of children have an onset to seizure time between the mean and 50 months?

Posted on January 15, 2023 by Assessments

Problems not marked with [SPSS] should be done by hand, as problems similar to those could be on the Midterm and/or Final. (Of course, feel free to check your work using SPSS!) Problems marked with [SPSS] are intended to be done with SPSS. For these problems, please attach the output file. A study was conducted […]

Explain each step and interpret the results.Test whether the variance of after-speed data is less than 19 mph2 at the α=5% significance level.

Posted on October 3, 2022 by Assessments

Suppose our goal is to quantify the impact of the repeal of the national maximum speed limit on average speeds on U.S. roads. Representative speed data are collected for particular time periods before and after the repeal. The spreadsheet “hw1_speed_data.csv” contains vehicular speed data before and after the repeal of a speed limit law. Use […]

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How many standard deviations away from the mean is a child whose time to the onset of seizure was 50 months? What proportion of children have an onset to seizure time of 50 or more months? What proportion of children have an onset to seizure time between the mean and 50 months?

Explain each step and interpret the results.Test whether the variance of after-speed data is less than 19 mph2 at the α=5% significance level.