Ask a New Question

The scores on a chemistry test are normally distributed. Approximately 95 percent of the scores fell between 78 and 92. What is the standard deviation for this distribution?

1 answer

how many std's away is the 2.5% boundary?
The mean is at (78+92)/2 = 85

Ask a New Question or answer this question.

Similar Questions

Scores on the LSAT are approximately normally distributed. In fact, published reports indicate that approximately 40 percent of
1. 2 answers
Scores on the LSAT are approximately normally distributed. In fact, published reports indicate that approximately 40 percent of
1. 0 answers
Scores on the LSAT are approximately normally distributed. In fact, published reports indicate that approximately 40 percent of
1. 1 answer
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7
1. 1 answer

more similar questions