AP Stats Unit

Which display is best to see the distribution?

• Pie Chart

• Two Way Table

• Histogram

• Bar Graph

Which display is best to compare several distributions?

• Box Plot

• Stem and Leaf Plot

• Histogram

• Pie Chart

When the data is skewed or has outliers which 2 should you use to describe center? (CHOOSE 2)

• Mean

• Median

• Standard Deviation

• Interquartile Range (IQR)

What is the Normal Model Rule?

• 50-75-99

• 50-75-99.7

• 68-90-99

• 68-95-99.7

Is this a probability distribution?

• No

• Yes

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.

• A

• B

• C

• D

• E

What is the shape of the distribution?

• bimodal

• trimodal

• unimodal

The manager of a city recreation center wants to estimate the percent of city residents who favor a proposal to build a new dog park. To gather data, the manager will select a random sample of city residents.

Which of the following is the most appropriate interval for the manager to use for such an estimate?

• A one-sample z�-interval for a sample proportion

• A one-sample z�-interval for a population proportion

• A one-sample z�-interval for a difference between population proportions

• A two-sample z�-interval for a difference between population proportions

A marketing representative wants to estimate the proportion of people in a state who like the new design on the packaging of a certain cleaning product. The representative interviewed 100 people at a certain supermarket, and 82 people indicated that they liked the new design. Have the conditions for creating a confidence interval for the population proportion been met?

• Yes, because the sample was selected at random.

• Yes, because sampling distributions of population proportions are modeled with a normal model

• Yes, because the sample is large enough to satisfy the normality conditions

• No, because the sample may not be representative of all people in the state.