Probability and Statistics Review

A data set can have more than one median?

• True
• False

A data set can have more than one mode

• True
• False

Find the range of the data set
1.43,1.05,34,56,89,1.1

• 87.9
• 87.57
• 87.95
• 89

Which number is not the mean, median, mode, or range of the data set 4, 3, 15, 11, 3, 8, 7, 5?

• 3
• 6
• 12
• 11

The mode score on the 6th grade math test was 94! Which of these interpretations must be correct?

• 99 was the highest score on the test.
• More students received a 94 than any other score
• No student scored below a 50
• A score of 91 was slightly below average.

If a data set is bimodal, how many modes does it have?

• 1
• 2
• 3
• 4

A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased (poor sample)?

• The sample didn't include students.
• The sample is too small.
• The sample can only be accurate if each teacher is included in the sample

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 (best) 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

Which scenario would produce the least biased (best) results?

• asking athletes at a gym what their favorite television show is
• asking shoppers at a store where their favorite place to shop is
• asking fans at a baseball game who their favorite baseball team is
• asking students in a college library what their favorite college sports team is

A radio station in Raleigh, NC wants to know the most popular song of the week. The DJ surveys random listeners who call in throughout the week. What is the population of the DJ’s survey?

• all the people in Raleigh, NC
• listeners of this radio station
• the listeners who call the station
• the most popular song of the week