Chapter 5 AP Stats Review

  Based upon the Normal Probability Plot, you would expect the distribution to be

• Linear

• Approximately Normal

• Skewed Right

• Skewed Left

What % of the area in a Normal curve is within 1 standard deviation of the mean?

• 50%

• 68%

• 95%

• 99.7%

What % of the Normal curve is greater than 1 standard deviation above the mean?

• 68%

• 34%

• 16%

• 5%

Suppose that the Chapter 1-5 test scores are normally distributed based on the model N(82,5). How many standard deviations from the mean is a student who scored a 70 on the test?

• z = 70

• z = 12

• z = 2.4

• z = -2.4

Is this a probability distribution?

• No, the sum of p(x) does not equal 1.

• Yes, all p(x) are between 0 and 1.

• No, all p(x) are not between 0 and 1.

• Yes, the sum p(x) is 1.

Is this a probability distribution?

• No

• Yes

• A

• B

• C

• D

• E

Again, assume the test scores follow the model N(82,5). What score would equate to z = 1.6?

• 90

• 83.6

• 87.6

• 74

Again, assume the test scores follow the model N(82,5). What percent of the scores fall below 82?

• 68%

• 50%

• 34%

• 95%

Again, assume the test scores follow the model N(82,5). What percent of the students scored below a 75?

• 8%

• 5%

• less than 1%

• 1.4%