Todd just got back his exam grades in three classes. In biology the class mean w

Question

Todd just got back his exam grades in three classes. In biology the class mean was 75.00 with a standard deviation of 10.00, Todd got an 80.00. In political science the class mean was 80.00 with a standard deviation of 12.00, Todd got an 80.00. In economics the class mean was 84.00 with a standard deviation of 8.00, Todd got a 78.00.

Which class showed the most variability in scores?

Which class showed the lowest variability in scores?

What percentage of the biology class scored higher than Todd?

What percentage of the political science class scored lower than Todd?

What percentage of the economics class scores higher than Todd?

Which class is Todd doing best in? State how you determined your answer.

Which class is Todd doing worst in? State how you determined your answer.

Explanation / Answer

1. The political science class showed the most variability in scores.
2. The economics class class showed the lowest variability in scores.
3. 30.85 percentage of the biology class scored higher than Todd.
4. 50 percentage of the political science class scored lower than Todd.
Please post the other questions separately as we are supposed to answer just one question or four sub parts of the same question.

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