SPRING WEEK 5
1. Using the test scores in the table below, what is the variance of thescores
on the exam? (Round your answer to the nearest whole number.)
Ans: 27
2. Using the test scores in the table below, what is the standard
deviation of the scores on the exam? (Round your answer to the
nearest whole number.)
Ans: 5
3. Assume that 500,000 people take the GED exam (high school proficiency
exam) each year and their scores form a normal distribution.If Danny scores
two standard deviations below the mean, what percentile is he?
Ans: 2.5th
4. Assume that 500,000 people take the GED exam (high school proficiency exam) each year and