Practice Test Answers

Which describes the spread of the data in the two box plots?

Using proportional reasoning, about how many students out of the 700 would you expect to request broccoli to be served?

The shapes of which plots, if any, show an outlier?

When comparing the shape of the two sets of data, what conclusion can someone draw?

Four students compared the data in the box plots. Nadine Kendrick Tahara Dean The medians are the same because both sets of data have the same minimum and maximum values. Mr. Yan’s class has a greater median because the box in that box plot is larger. Mrs. Gonzalez’s class has a greater median because the line inside that box is located at a greater value. The medians are both 7 because the upper quartile for the sets of data is 7. Which student is correct?

Julian and Nina are playing a game. Their scores for five games are shown in the table. Julian’s and Nina’s Scores Julian’s Scores 42 41 46 50 38 Nina’s Scores 47 27 45 32 49 Which statement comparing the medians to the ranges is true?

A town’s athletic league contains 18 baseball teams. The board members of the league want to survey adults attending games to determine if they believe the athletes are showing good sportsmanship. The board members attended one game and surveyed an equal number of adults supporting each of the two teams. Which best explains the validity of the results?

At Lawson Middle School, Mr. Hernandez asked 90 randomly selected students from each grade level for their favorite subject, and 28 chose social studies as their favorite. He used this data to draw the inference that out of the 250 middle school students, about 20 percent prefer social studies. Did he make a reasonable inference?

An employer asks the survey question “How much money do you spend on gasoline per week to get to work?” of her employees that drive to work. Which best describes why she chose to only ask the employees that drive to work rather than all of her employees?

The student government wants to determine the theme for the eighth-grade dance. Which group would it be best to take a sample from?

The heights of the starting players on each of two basketball teams are shown in the table. Heights of Starters on Team A and Team B Team A 70 in. 72 in. 75 in. 68 in. 70 in. Team B 71 in. 73 in. 71 in. 72 in. 73 in. Jacob found that the mean height of Team A is 71 and the mean height of Team B is 72. He believes that because Team B has a greater mean, it also has a greater mean absolute deviation. Which explains Jacob’s error?

Lawrence performs a survey to determine the average number of minutes of exercise seventh-grade athletes get in one week. He gets a list of sports and the seventh-grade students participating in each sport. He then chooses 10 people from each list to complete the survey. How can Lawrence’s sample be improved to be more representative of the population?