Math Deviations

The percent of data falling between 1 standard deviation below and above the mean is

• 68%

• 34%

• 95&

• 99.7%

The percent of data falling between 2 standard deviations below and above the mean is

• 95%

• 68%

• 99.7%

• 13.5%

The mean math score of 11th graders is 94, with a standard deviation of 3. Use the Empirical Rule to find the percentage of adults with scores between 88 and 100 . (Assume the data set has a bell-shaped distribution.)

• 97.5%

• 68%

• 95%

• 81.5%

What is the z-score corresponding to a grade point of 87, when the mean is 79 and the standard deviation is 2.25?

Find the z-score of the value 234 when the mean is 189 and standard deviation is 18.3.

The shape of the data above is.

• Skewed Left

• Skewed Right

• Symmetric

Describe the distribution of the given data set above.

• Skewed left

• Skewed right

• Symmetric

• Uniform

Adam's Z-score on a test is +2.50. What does this mean?

• Adam's score has a 2.5% chance of being better than any other randomly selected score.

• Adam's test score was better than 25% of his peers.

• He scored 2.5 standard deviations above the average.

• He did terrible.