Data and Statistics

Two friends measure the distance a racecar travels over 10 trials.

Which of the conclusions best supports the dot plots?

• Both Jamal's and Kendall's racecars had an equal spread in their data.

• On average, Kendall's racecar traveled further.

• The median distance Jamal's racecar traveled was 6.5 ft.

• Both Jamal and Kendall had the same mode of data.

Which of the following statements does not represent the data?

• The scores in Mrs. Ruiz's class have less variability than the scores in Mrs. Moore's class.

• The median of Mrs. Moore's class is equal to the first quartile of Mrs. Ruiz's class.

• The interquartile range of both classes is equal.

• The scores in Mrs. Moore's class have a greater spread than the scores in Mrs. Ruiz's class.

Which of the following represents the difference in the centers of Mrs. Moore's class and Mrs. Ruiz's class?

• 7

• 11

• 4

• 3

A small business creates a circle graph to chart its expenses.

In March, Mrs. Jones's business spent $480 on raw materials. Based on the information in the graph, how much money was spent on business expenses in March?

• $1,600

• $144

• $2,100

• $1,850

At the zoo, the length of each iguana is measured. Which statement is best supported by the information below?

• Over half of the iguanas measure 14 centimeters or more in length.

• 25% of the iguanas measure 12 centimeters in length.

• The number of iguanas that measure 15 centimeters or more is equal to the number that measure 11 centimeters or less.

A random sample of 40 students from each grade level was surveyed regarding their preference for a class field trip.

What percent of students surveyed preferred going to the zoo for their class field trip?

Mathematical Equivalence

ON

A random sample of 40 students from each grade level was surveyed regarding their preference for a class field trip.

Based on the information in the table, which inference is true?

• 8th graders wanted to go to the zoo more than 7th graders wanted to go to the museum.

• More 8th graders than 7th graders want to go to the sports complex.

• 7th and 8th graders preferred going to the zoo over the museum and sports complex.

• More 8th graders wanted to go to the museum or sports complex than 7th graders wanted to go to the zoo or sports complex.

Two friends measure the distance a racecar travels over 10 trials.

The shape of Kendall's data is (a)   .

• Skewed left

• Skewed right

• Symmetric

• Uniform

Data is collected from a random sample of 40 people at the public library. If the public library has 300 people, then which of the following conclusions can be drawn?

• Exactly 42% of the library patrons chose mystery.

• Non-fiction and science fiction represents over half of the selections.

• Over 25% of the library patrons chose a science fiction book.

• 136 total patrons can be expected to choose a non-fiction book.

A small business creates a circle graph to chart its expenses.

In January, Mrs. Jones's business had expenses that totaled $2,500. Based on the information in the graph, how much money did Mrs. Jones spend on marketing in January?

• $37,500

• $375

• $750

• $625