Probability and Statistics Final Review Spring 2024

Ms Moffett, the school principal is gathering data about students and homework completion. To get valid results, which survey method should she use?

• Post a link to her survey questions on the school website.

• Survey the first 30 students who walk into the building on Monday

  morning.

• Ask each homeroom teacher in 6th grade to select 4 students to answer her

  survey.

• Have the computer randomly generate a list of students to answer her

  survey.

Identify the population and sample in the following survey: To gauge student preference of a new school mascot, the Student Council President surveyed the members of the school soccer team.

• Population: students in the school

  Sample: school soccer team

• Population: school soccer team

  Sample: students in the school

• 
  Population: school soccer team

  Sample: Student Council President

• Population: students in the school

  Sample: school mascot

The data below shows the survey results of 75 randomly selected students.

The school has 300 students total. Based on the results of the poll, how many of the school’s students should be expected to travel by plane over spring break?

• 24 students

• 40 students

• 136 students

• 225 students

Three girls on a high school track-and-field team practiced the shot put. Each girl made 10

attempts, and the distances measured after each attempt are shown on the line plots below.

Based upon the samples, which girl would you most likely expect to win first place at a track

meet for shot put?

• Candace

• Sara

• Rosie

• It will be a tie.

Use the box-and-whisker plots to determine which statement is not true.

• The median of the men’s ages is greater than the median of the women’s ages.

• The interquartile range of the men’s ages is greater than the interquartile range of the women’s ages.

• The youngest member of the club is a woman.

•  The range of the men’s ages is greater than the range of the women’s ages. 

On the first day of class, Alana skimmed the first 17 pages from each of the books assigned in her literature class. Each assigned book has an equal number of pages.  Is this sample of the assigned reading likely to be biased or unbiased?            

• Biased- Voluntary Response Sample

• Biased- Convenience Sample

• 
  Unbiased- Simple Random Sample

• Unbiased- Systematic Random Sample

  
  

The double dot plots show the average wait times in minutes for two popular rides at an amusement park. Which ride typically has a longer wait time?

• Rocket Blast

• Topsy Turvy

• No inference can be made from the information provided.

• The wait times are the same for both groups.

The dot plot shows the amount of time that ten US students and ten Australian students took to get to school. 

The mean for the U.S. is 8.4 minutes and the mean for Australia is 15.1 minutes.

Which statement is true about the MAD of the Australian data set? 

• It is significantly less than the MAD of the U.S. data set. 

  
  

• It is exactly equal to the MAD of the U.S. data set.

  
  

• It is approximately equal to the MAD of the U.S. data set.

  
  

• It is significantly greater than the MAD of the U.S. data set.

  
  

The double dot plot below shows the daily high temperatures for two cities for thirteen days. Which statement below is true?

• Both cities have the same mean.

  
  

• Springfield's mean is higher than Lake City's.

  
  

• The spread of data about each mean is the same.

  
  

• The temperature is more consistent in Lake city than in Springfield.

  
  

In a bag of marbles, 1/2 are red, 1/4 are blue, 1/6 are green, and 1/12 are yellow.

You pick a marble without looking. The marble is most likely to be: 

• Red

• Yellow

• Blue

• Green