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.
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 […]