AP Stat Unit 5

Identify all graphs which help determine the shape of the distribution.

• boxplot

• stemplot

• normal probability plot

• histogram

• scatterplot

Identify the type of confidence interval described.

σ is known

• 1 proportion z interval

• 1 proportion t interval

• z interval

• t interval

Identify the type of confidence interval described.

σ is unknown

• 1 proportion z interval

• 1 proportion t interval

• z interval

• t interval

Identify the type of confidence interval described. A survey indicates 14 of 71 respondents brush their teeth multiple times per day

• 1 proportion z interval

• 1 proportion t interval

• z interval

• t interval

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

Is this a probability distribution?

• No

• Yes

How is normality established for a proportion problem?

• n ≥ 30, Central Limit Theorem

• np > 10, n(1 - p) > 10

• the distribution shows no outliers, n < 10

• N ≥ 10n

• subjects have been selected using some random process

Identify the type of confidence interval described. degrees of freedom are required to determine the critical value.

• proportion z interval

• proportion t interval

• z interval

• t interval

How is indepedence established for a proportion problem?

• n ≥ 30, Central Limit Theorem

• np > 10, n(1 - p) > 10

• the distribution shows no outliers, n < 10

• N ≥ 10n

• subjects have been selected using some random process