SP1 Practice

A mall owner wants to survey people in the mall to find out which stores the people shop at most. Which sample will produce the most valid results?

• People shopping in a pet store.

• People exiting a woman's shoe store.

• People eating at the food are inside the mall.

• People watching their children in the indoor playground.

Carlos and Sherry surveyed students to determine whether the school roster wanted a school mascot. Carlos selected 20 students at random from the official attendance roster. Sherry randomly surveyed 50 students who entered the cafeteria. Considering possible sampling errors, which statement below is true?

• Carlos' sample is biased because he surveyed fewer people.

• Sherry's sample is biased because she surveyed more people.

• Carlos' sample is biased because his sample is more representative of the students at the school.

• Sherry's sample is biased because her sample is not representative of all the students at school.

Mr. Wallace wants to survey his students about where to go on a class trip. Which survey form would be BEST for Mr.Wallace to give his students?

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A marketing company will conduct a survey to determine which grocery store is most popular in the city. Which group of people would NOT give you a random sample?

• every 100th household in the city

• every 10th person walking in the mall

• every 100th person from the telephone book

• every 10th person outside of one grocery store

The administrator at the local zoo wants to estimate attendance for the upcoming year. To get an estimate, she multiplied the attendance on opening day last year by the number of days the zoo will open this year. Will the administrator have conducted a valid claim?

• No, because no one goes to the zoo on opening day

• Yes, because everyone comes to the zoo on opening day.

• Yes, because the same number of people come every day.

• No, because more people come on opening day than the other days.

Mrs. Cruz is conducting a survey to find out the favorite snack of fifth and sixth graders. She will ask a sample of 100 students. Which of the groups below should be surveyed to get the best representative sample?

• 100 students at the movie theater

• the first 100 students who go to a local baseball game

• 5 students from each of the 20 elementary schools

• 20 students from each of the 5 local fifth and sixth grade schools

A student surveyed 100 people and found that 94 out of the 100 people surveyed enjoy exercising. Which statement is the best explanation for these results?

• The people surveyed worked at a national sporting goods store the sold exercise clothing.

• The people surveyed recently saw a television program about the benefits of exercising.

• The people surveyed were eating at a restaurant near and exercise facility.

• The people surveyed were entering or exiting and exercise facility.

The 5th grade class wanted to find out how often people in their town sent handwritten letters using the United States Postal System. Which group would be the most appropriate to survey?

• women and girls

• men and boys

• shoppers at the mall

• students in the fourth grade

During the campaign for class president. Lia surveyed students at her school on which candidate each planned to vote for. The results are shown in the table below.

Based on her survey, Lia concluded that Mike Briggs would lose because he would only receive 25% of the votes. How did Lia misinterpret the data?

• Lia predicted the results before they actually happened.

• Lia interpreted the data during the campaign instead of after it.

• Lia used the value in the table as a percent rather than the actual number of votes he received.

• Lia's survey was not realistic because the number of possible votes should have totaled 100.

Anne wants to survey middle school girls on their favorite weekend activities. Which sample would give Anne the BEST results?

• girls in Anne's gym class

• girls at the mall on the weekend

• every third girl exiting a middle school

• girls exiting a movie theater on the weekend