Draw Inferences from Data Review

The dot plots show the number of calls that two radio stations receive each day for a ten-day period. The two shows are shown at the same time. Which of the following inferences based on the median values is valid?

• The radio shows receive similar amounts of calls.

• Radio Show 1 generally receives more calls.

• Radio Show 2 generally receives more calls.

Group A and Group B were randomly sampled from the same population. What inference can you make?

• Group A has higher overall variability because it has a larger range than Group B.

• Group A has a lower overall variability because it has a smaller range than Group B.

• Group B has a higher overall variability because it has a larger range than Group A.

• Group B has a lower overall variability because it has a smaller range than Group A.

Sonya randomly surveys 26 seventh graders to gather data about the amount of time spent each week using the Internet. Sonya records the data in the dot plot shown. What is the median of the data set?

• 7

• 7.5

• 8

• 7.25

Anna recorded the types of vehicles that drive by her house. The table shows the types of the last 150 vehicles that drove by her house. Using the data, what is the probability that the next vehicle to drive by her house will be a pickup truck?

The dice is rolled 40 times. The results are: 1 - 5 times 2 - 4 times 3 - 8 times 4 - 2 times 5 - 15 times 6 - 6 times Which statement is TRUE about the results of landing on a 5?

• The theoretical probability is about twice the experimental probability.

• The experimental probability is about twice the theoretical probability.

• The theoretical probability is about four times the experimental probability.

• The experimental probability is about four times the theoretical probability.

The container has 25 yellow, 15 green, 30 blue, 10 pink, and 20 orange balls. Balls were selected one at a time, results recorded, and placed back in the container. After 80 draws, the pink ball was selected 4 times.

Which statement BEST explains the experimental and theoretical probability of selecting a pink ball?

• The experimental probability is greater than the theoretical probability. As the number of draws increases, the probabilities will be closer to each other.

• The theoretical probability is greater than the experimental probability. As the number of draws increases, the probabilities will be closer to each other.

• The experimental probability is greater than the theoretical probability. As the number of draws decreases, the probabilities will be closer to each other.

• The experimental probability is less than the theoretical probability. As the number of draws decreases, the probabilities will be closer to each other.

Will is conducting an experiment where he spins a spinner and records the result. He conducted 40 trials in his experiment. The results are in the table.

If Will were to spin the spinner 175 times, approximately how many times could he expect to land on green?

• 11 times

• 51 times

• 48 times

• 26 times

A school board randomly samples 80 students to determine their opinion on requiring uniforms for the next school year. The given table show the results. Based on this data, which statements are true? (Select all that apply)

• Over half of the students sampled were in favor of the uniforms.

• 56.25% of the students are in favor of the uniforms.

• 13.75% of students are opposed to the uniforms.

• Over half of the students are undecided about the uniforrms.

Caleb is comparing the growth of plants using two different fertilizers. Use the measures of center from the box plots to make an inference about the data.

• Based on the means, plants in Group A grew more than plants in Group B

• Based on the means, plants in Group B grew more than plants in Group A.

• Based on the medians, plants in Group A grew more than plants in Group B

• Based on the medians, plants in Group B grew more than plants in Group A.

The dot plot shows a random sample of the number of fish caught and released by 30 participants during a two-day fishing derby.

Use the mean value of each data set to make an inference about the number of fish caught each day.

• On average, most participants caught and released 5 or more fish.

• More participants caught 6 fish than any other number.

• The same participants who caught and released 1 fish the first day caught and released 1 fish the second day.

• On average, participants caught and released more fish on Day 2.