Mathematics, 22.07.2019 22:00 pastmarion
Astudy was designed to investigate the effects of two variables long dash (1) a student's level of mathematical anxiety and (2) teaching method long dash 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 250 with a standard deviation of 40 on a standardized test. assuming a mound-shaped and symmetric distribution, in what range would approximately 99.7% of the students score?
Answers: 1
![250\pm 3(40)/tex]i.e. [tex]250\pm 120/tex][tex]=(250-120,\ 250+120)=(130,\ 370)](/tpl/images/0121/1128/11a70.png)
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Astudy was designed to investigate the effects of two variables long dash (1) a student's level of m...
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