PSAT Data Blitz

The total number of followers of a Mars rover’s social media account is 1,764,000, as summarized by age in the

graph above. Which of the following could be the median age of the followers?

• 37

• 29

• 20

• 16

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

A geologist examined the 95 rocks on display at a museum. She recorded the type of rock and whether the rock

has a shiny or dull surface as shown in the two-way table above. If a nonmetamorphic rock from the museum’s display is selected at random, what is the probability that the rock has a shiny surface?

• $\frac{17}{53}$

• $\frac{17}{45}$

• $\frac{28}{45}$

• $\frac{18}{25}$

Tags

CCSS.8.SP.A.4

A marketing company surveyed 50 randomly selected residents of a town in order to estimate the age distribution

of residents in the town. The table above shows the results of the survey. What percent of the residents surveyed were age 70 or younger?

• 13%

• 26%

• 74%

• 87%

Tags

CCSS.7.SP.A.2

On election day, a local news show randomly selected 500 people who voted in a mayoral election. The voters

were asked to report which candidate they voted for, and the results of the survey are shown in the table above. A total of 15,000 people voted in the election. Based on the results of the survey, what is the best estimate for the

total number of votes Maria Hernandez is expected to receive?

• 3,500

• 4,850

• 7,750

• 8,250

Leta has a large assortment of petunia, rose, and zinnia flowers. All of the flowers in the assortment are either

pink, red, or white. The table above shows the number of flowers by color and type. Leta separates out the white flowers and picks one of them at random. What is the probability that the flower Leta

picks is a rose?

• $\frac{1}{3}$

• $\frac{9}{24}$

• $\frac{1}{2}$

• $\frac{4}{9}$

Tags

CCSS.8.SP.A.4

The table above shows the distribution of US states according to whether they have a state-level sales tax and a

state-level income tax. To the nearest tenth of a percent, what percent of states with a state-level sales tax do not have a state-level income tax?

• 6.0%

• 10.0%

• 13.3%

• 15.5%

Tags

CCSS.8.SP.A.4

A group of 10 students played a certain game. Every player received a score equal to an integer from 1 to 10,

inclusive. For the 10 players, the mean score was 4. If more than half of the players received a score greater

than 5, which of the following is true about the mean score of the remaining players?

• It must be less than 4.

• It must be equal to 4.

• It must be 4 and 5.

• It must be greater than 5.

Tags

CCSS.6.SP.B.5C

A sample of 600 ninth graders was selected at random and asked how much time they spend on homework each

day. Of the ninth graders selected, 220 spend less than 2 hours on homework each day. If the conclusion was

drawn that “approximately 1.35 million ninth graders spend less than 2 hours on homework each day,” which of

the following is closest to the population, in millions, of ninth graders?

• 0.368

• 0.495

• 3.68

• 5.84

Tags

CCSS.7.SP.A.2

The energy pyramid above shows four trophic levels in an ecosystem and the direction of energy transfer between

those levels. On average, 10% of the net energy of one trophic level is transferred to the next trophic level in an ecosystem. Based on the energy pyramid, if primary producers have 5,000 joules (J) of energy, approximately how much of this energy, in calories, is transferred to the secondary consumers in this ecosystem? (1 calorie = 4.18 J)

• 11.96

• 20.90

• 119.6

• 209.0

A magazine article on video game habits in the United States reported that in 2012 gamers spent an average of

5.6 hours per week playing games. The article also reported the average for 2013 to be 6.3 hours per week.

Based on the article, how did the average number of hours that gamers spent playing games per week change

from 2012 to 2013?

• It decreased by 12.5%.

• It increased by 7.0%.

• It increased by 11.1%.

• It increased by 12.5%.

Tags

CCSS.6.RP.A.3C