Statistics and Data Review

Mrs. Moore’s and Mrs. Ruiz’s classes are competing for the best scores on their math test. 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.

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. If there are 180 members of the 8th grade class, then what percent preferred either the museum or the sports complex?

• 65%

• 47.5%

• 17.5%

• 26%

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 Jamal’s racecar traveled was 6.5 ft.

• Both Jamal and Kendall had the same mode of data

Two friends measure the distance a racecar travels over 10 trials. Which of the following represents the shape of Kendall’s data?

• Skewed left

• Skewed right

• Symmetric

• Skewed symmetric

Mrs. Moore’s and Mrs. Ruiz’s classes are competing for the best scores on their math test. Which of the following represents the difference in centers of Mrs. Moore’s class and Mrs. Hernandez’s class?

• 7

• 11

• 4

• 3

Below is data 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 a mystery.

• Non-fiction and science fiction represent 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 their 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

A small business creates a circle graph to chart their 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

The Thompson Family has a garden in their backyard. They take the produce each week to a local farmers market. What percent of the garden is tomatoes?

• 30%

• 28%

• 20%

• 6%