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4 Questions returned
No. & Date AskedQuestion
# 840 :: 2/11/10
Question 840 has been Answered
Sat verbal scores are normally distributed with a mean of 426 and a standard deviation of 94. Use the Empirical Rule to determine what percent of the. . .

Empirical Rule

# 819 :: 10/15/09
Question 819 has been Answered
For a particular sample of 50 scores on a psychology exam, the following results were obtained. First quartile = 52 Third quartile = 84 Standard dev. . .

Chebyshev's Theorem, Midrange, Empirical Rule

# 572 :: 1/13/09
Question 572 has been Answered
At one university, students are given z-scores at the end of the semester rather than the traditional GPAs. The mean and standard deviation of all stu. . .

Empirical Rule, Z-Score

# 493 :: 11/4/08
Question 493 has been Answered
On a police sergeants exam, the historical mean scored was 80 with a standard deviation of 20. Four offiers scored 195,175,191, and 189 respectively. . . .

Empirical Rule, Z-Score, Unusual Event, Percent Score