Author Question: A study was designed to investigate the effects of two variables - (1) a student's level of ... (Read 100 times)

DyllonKazuo · **on:** Jan 16, 2020

A study was designed to investigate the effects of two variables - (1) a student's level of mathematical anxiety and (2) teaching method - on a student's achievement in a mathematics course. Students who had a low level of mathematical anxiety were taught using the traditional expository method. These students obtained a mean score of 290 with a standard deviation of 50 on a standardized test. Assuming no information concerning the shape of the distribution is known, what percentage of the students scored between 190 and 390?
◦ at least 75%
◦ approximately 68%
◦ approximately 95%
◦ at least 88.9%

ebonylittles · **Reply #1 on:** Jan 16, 2020

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