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Probability Review
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
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.
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.
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
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.
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
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.
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
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
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
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.
45\frac{4}{5}54
25\frac{2}{5}52
12\frac{1}{2}21
15\frac{1}{5}51
If a spinner is spun once, what is the probability it will land on "X"?
35\frac{3}{5}53
37\frac{3}{7}73
38\frac{3}{8}83
A jar contains marbles of different colors. The probability of drawing a red marble at random is 2/10.
35\frac{3}{5}53 ; likely
45\frac{4}{5}54 ; likely
35\frac{3}{5}53 ; unlikely
45\frac{4}{5}54 ; unlikely
The probability of an event is 6/8. Which word best describes the probability?
certain
impossible
likely
unlikely
What is the probability of spinning an even number?
equally likely
less likely
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?
57\frac{5}{7}75
47\frac{4}{7}74
27\frac{2}{7}72
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.
What is the probability that the arrow will land on a section labeled with a number less than 4?
58\frac{5}{8}85
34\frac{3}{4}43
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
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?
16\frac{1}{6}61
13\frac{1}{3}31
23\frac{2}{3}32
56\frac{5}{6}65
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