Studies

Which statement(s) about statistical studies is false?
1.  If a study is an experiment, there is a treatment and a response variable. 
2.  A survey of all students in science classes would be a bad sample to determine how many students work.
3.  Randomly selecting 30 freshmen to survey would give a good estimation of how the entire student body would respond
4.  A survey of all Alg 2 students would be a good sample to determine the number of students who like math.

• 1 and 2 only
• 3 only
• 1 and 3 only
• 3 and 4 only

A survey is _____________

• an observational study
• an experiment

Leslie surveyed the 9 youngest students in the elementary school.  Is this sample of the students in the school likely to be representative? Explain on your answer. 

• yes
• no

Karen surveyed the first seven shoppers at the produce stand.  Is this sample of shoppers at the produce stand likely to be biased? Explain your answer. 

• yes
• no

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

• to randomly ask 8th grade students who went on a field trip last year
• to randomly choose some 7th grade students to select a location
• to ask all 7th grade teachers and administrators for a location
• to ask the student council to choose a location

A state fair had 1,019,887 people in attendance. The fair committee performed a survey. The question was, “What do fairgoers enjoy most about the fair?” Of those who responded, 83% reported eating traditional foods. Which group of people represents the sample group?

• Fair goers who like traditional foods
• The fair committee
• Fair goers who responded to the survey
• All fair goers

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

Mrs. Croix 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 local elementary schools
• 20 students from each of the 5 local fifth- and sixth-grade schools

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2