Statistical Measures and Summarize Data

A group would like to estimate the percentage of town residents who would support a teen curfew.

Which statement describes a method that will help the group accurately estimate this percentage?

• Take a random sample of residents in the town, and ask each resident in the sample whether or not they support a teen curfew. Then calculate the percentage of the total who say "yes."

• Take a random sample of towns in the state. Ask an administrator in the city office whether the town has a teen curfew, and then calculate the percentage of the total who say "yes."

• Contact every parent who lives in the town and ask whether they support a teen curfew. Calculate the percentage of the total who say "yes."

• Identify all nearby towns that have a teen curfew. Contact the mayor of each of those towns and ask whether he or she thinks the curfew is a good policy. Calculate the percentage of the total who say "yes."

A company sells hockey sticks. Members of the company's research group would like to estimate the percentage of their customers who are left-handed. They plan to survey a sample of customers.

• randomly select 45 customers from a list of customers who have purchased left-handed hockey sticks

• randomly select 45 customers from a list of all customers

• select the next 45 customers who place an order

• select the next 45 customers who place an order and are left-handed

A city employee collected survey data from 2330 randomly selected residents. A total of 865 of these residents said that they thought the city should devote more city funds to repair roads.

To the nearest percent, what is a good estimate of the percentage of all residents who thought this?

Enter your answer in the box.

An ice cream store owner randomly samples 50 customers each day on three separate days to give their opinion about which flavor should be the flavor of the month.

Based on the results of the survey, if the ice cream store owner asks 2300 people, _________ will most likely pick vanilla to be the flavor of the month. Fill in the blank.

These line plots show the results of a survey of 10 boys and 10 girls about how many hours they slept the previous night.

• The range is greater for the boys.

• The range is greater for the girls

These line plots show the results of a survey of 10 boys and 10 girls about how many hours they slept the previous night.

• The mean is greater for the boys

• The mean is greater for the girls

A survey asked 10 boys and 10 girls how many text messages they sent the previous day. The number of texts are given in the line plots.

• The data set with the greater range is the girls.

• The data set with the greater range is the boys.

A survey asked 10 boys and 10 girls how many text messages they sent the previous day. The number of texts are given in the line plots.

• The median is greater for the boys.

• The median is greater for the girls.

The line plot shows the results of a survey of 10 boys and 10 girls about how many times they saw a popular movie in movie theaters.

• Most boys and girls only saw the movie once in theaters.

• The median for the boys' viewing is less than that for the girls' viewing.

• On average, boys saw the movie more than girls.

• The data for the girls is more spread out than the data for the boys.

What is the overlap of Data Set 1 and Data Set 2?

• high

• moderate

• low

• none