Honors Algebra 2 with Stats, 9.1 – 9.6 Review

Find the standard deviation of the data set: 18, 20, 17, 22, 19, 21, 20

• 1.72

• 2.16

• 2.58

• 1.94

For 2 – 3, find each using a normal distribution curve. Answers should be in decimal form. 2) P(x ≤ μ + σ)

• 0.8413

• 0.1587

• 0.5000

• 0.9772

For 2 – 3, find each using a normal distribution curve. Answers should be in decimal form. 3) P(μ ≤ x ≤ μ + 2σ)

• 0.4772

• 0.3413

• 0.6826

• 0.4987

For 4 – 6, a normal distribution has a mean of 32 and a standard deviation of 4. Find the probability that a randomly selected x-value from the distribution is in the given interval. 4) between 24 and 32

• 0.4772

• 0.3413

• 0.6826

• 0.1587

For 4 – 6, a normal distribution has a mean of 32 and a standard deviation of 4. Find the probability that a randomly selected x-value from the distribution is in the given interval. 5) at most 36

• 0.8413

• 0.1587

• 0.5000

• 0.9772

For 4 – 6, a normal distribution has a mean of 32 and a standard deviation of 4. Find the probability that a randomly selected x-value from the distribution is in the given interval. 6) at least 28

• 0.8413

• 0.1587

• 0.5000

• 0.9772

About what percent of people scored between a 31 and 55?

• 47.72%

• 25.13%

• 62.89%

• 15.47%

About what percent of people scored a 79 or greater?

• 2.28%

• 15.87%

• 50%

• 34.13%

For all students taking an Algebra 1 end-of-course exam, the standard deviation of their scores was 5.

• Parameter

• Statistic

• Variable

• Constant

In the United States, a survey of 3000 adults found that 89% like pizza.

• Statistic

• Parameter

• Variable

• Population