Mathematics, 05.05.2020 06:28 luisannavasquez6129
If the quality of teaching is similar in a school, the scores on a standardized test will have a standard deviation of 12. The superintendent wants to know if there is a disparity in teaching quality, and decides to investigate whether the standard deviation of test scores has changed. She samples 25 random students and finds a mean score of 156 with a standard deviation of 5.4822. Is there evidence that the standard deviation of test scores has decreased at the α=0.1 level? Assume the population is normally distributed.
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M.xyz =radians. covert this radian measure to its equivalent measure in degrees.
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If the quality of teaching is similar in a school, the scores on a standardized test will have a sta...
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