Probability

Probability Review

Multiple Choice

George is conducting a survey to determine if corn dogs should be sold in the school cafeteria. Which sampling method will give him the best results?

• Interview randomly selected vegetarian students

• interview randomly selected students at waffle house

• interview randomly selected students who bring a lunch box

• interview randomly selected students who eat lunch in the cafeteria

Multiple Choice

Bob and Stacey survey a total of 215 students about their favorite flavors of milk shakes. The table shows the results of the survey.

• About half of the students surveyed preferred chocolate milk shakes.

• About 25% of students prefer strawberry milk shakes.

• The majority of the students surveyed prefer either strawberry or vanilla milk shakes.

• There are 28 more students who prefer vanilla to chocolate milk shakes.

Multiple Choice

A random sample of shoppers at Food Lion are asked the question, "If there is no difference in cost, would you prefer to buy organic or non-organic produce?" The table shows the results. Which statement is a correct inference from this data?

• There is no difference between growing produce organically or inorganically.

• Shoppers at Food Lion have no preference regarding organic or non-organic produce.

• Organic produce is better for the environment

• In general, shoppers at Food Lion prefer organic produce.

Multiple Choice

A random sample of moviegoers are surveyed to determine what types of movies they enjoy most. The table lists the results.

Based on the survey, which double-feature combination would pull in the largest audience?

• children's movie and a documentary

• comedy and a romantic movie

• action movie and a documentary

• adventure movie and a children's movie

Multiple Choice

Lenny surveys a random sample of shoppers at a grocery store. He conducts his survey on Saturday morning. The survey consists of a single question: "What mode of transportation did you use to travel to the grocery store this morning?" The table shows the results.

• Very few shoppers use a car to travel to the grocery store

• The majority of shoppers walk to the grocery store

• Saturdays are busier at the grocery store than Tuesdays

• More shoppers typically take the bus than ride their bikes.

Multiple Choice

The manager of a school cafeteria took a random survey of students to find out what kind of fruit students prefer. The results are shown in the table. Based on the results, what type of fruit is most popular overall?

• apples

• bananas

• grapes

• oranges

Multiple Choice

The box and whisker plot shows the scores in a science test of two classes. Based on the distribution of data, which observation is NOT correct?

• The median score of both the classes is the same

• The minimum score of both the classes is the same

• Both the classes have the same value for the first quartile

• Both the classes have the same value for the third quartile.

Multiple Choice

The table shows the quantity of licorice sold versus the quantity of snow caps sold at the movie theater Wednesday through Sunday. What is the difference between the median number of licorice sold and the median number of snow caps sold.

• 20

• 11

• 5

• 2

Multiple Choice

Basketball teams play 12 games each season. Two teams track their scores for each game. Which statement can be determined using the data in the line plots?

• The data from the Bulls shows more variation

• The data from the Spartans shows more variation

• The data from the Bulls and Spartans scores shows the same variation

• Not enough information is given to determine variation

Multiple Choice

The dot plots show a random sample of two video game players' scores. What can be inferred from these data?

• Player 1 is a more consistent video game player than Player 2

• Player 1 is a more experienced video game player than Player 2

• Player 2 is a more consistent video game player than Player 1

• Player 2 is a more experienced video game player than Player 1

Multiple Choice

Martha is tossing a fair coin. She tosses the coin twenty times, and it lands on heads sixteen times. If Martha tosses the coin a twenty-first time, what is the probability that it will land on tails.

• $\frac{4}{5}$

• $\frac{2}{5}$

• $\frac{1}{2}$

• $\frac{1}{5}$

Multiple Choice

If a spinner is spun once, what is the probability it will land on "X"?

• $\frac{3}{5}$

• $\frac{1}{5}$

• $\frac{3}{7}$

• $\frac{3}{8}$

Multiple Choice

 A jar contains marbles of different colors. The probability of drawing a red marble at random is 2/10.

What is the probability and likelihood that the marble drawn is NOT red?

•  $\frac{3}{5}$  ; likely

•  $\frac{4}{5}$  ; likely

•  $\frac{3}{5}$  ; unlikely

•  $\frac{4}{5}$  ; unlikely

Multiple Choice

The probability of an event is 6/8. Which word best describes the probability?

• certain

• impossible

• likely

• unlikely

Multiple Choice

What is the probability of spinning an even number?

• certain

• impossible

• equally likely

• less likely

Multiple Choice

In a classroom of 28 students, 12 students are girls. If a student is selected randomly, what is the probability that the student is a boy?

• $\frac{5}{7}$

• $\frac{4}{7}$

• $\frac{3}{7}$

• $\frac{2}{7}$

Multiple Choice

Pedro is conducting an experiment. He is flipping a fair coin and recording how many times it lands on heads and how many times it lands on tails.

Which statement regarding the experimental and theoretical probability is true?

• The experimental probability should get closer to the theoretical probability as Pedro conducts more experiments.

• The experimental probability should get further from the theoretical probability as Pedro conducts more experiments.

• The experimental probability should stay the same distance from the theoretical probability as Pedro conducts more experiments.

• The number of experiments Pedro conducts will not affect the experimental probability.

Multiple Choice

What is the probability that the arrow will land on a section labeled with a number less than 4?

• $\frac{3}{8}$

• $\frac{1}{2}$

• $\frac{5}{8}$

• $\frac{3}{4}$

Multiple Choice

A factory makes cars. The table shows the estimated probabilities the factory makes 1, 2, or 3 defective cars on any given day.

What is the probability the factory makes less than 2 defective cars per day?

• 0.22

• 0.31

• 0.47

• 0.78

Multiple Choice

If a student spins the spinner and flips a fair coin at the same time, what is the probability that the spinner lands on red, and the coin lands on tails?

• $\frac{1}{6}$

• $\frac{1}{3}$

• $\frac{2}{3}$

• $\frac{5}{6}$