Basic Statistics & Probability True or False

1. Two dice were rolled 50 times, and their sums were recorded in this bar graph.

Find the mode of the data. -> 6.5
2. Two dice were rolled 50 times, and their sums were recorded in this bar graph.

Find the median of the data. -> 6.5
3. Two dice were rolled 50 times, and their sums were recorded in this bar graph.

How does the theoretical probability of rolling a sum of 12 compare to the experimental probability? -> The experimental probability is higher.
4. This stem-and-leaf plot shows the scores from the last English test.

If a test is chosen at random, what is the probability that the score will be divisible by 4 AND greater than 80? -> ≈ 80%
5. This stem-and-leaf plot shows the scores from the last English test.

If a test is chosen at random, what is the probability that the score will be divisible by 4 OR greater than 80? -> ≈ 77%
6. This stem-and-leaf plot shows the scores from the last English test.

Find the mean, median, and mode of the stem-and-leaf plot. Round each answer to the nearest whole number. -> Mean = 82, median = 80, and mode = 81
7. 35 students took a test. This box-and-whisker plot shows the results.

What percentage of the students scored greater than 65 on the test? -> ≈ 97%
8. 35 students took a test. This box-and-whisker plot shows the results.

If a score is chosen at random, what is the probability that it lies inside the box? -> 50%
9. 35 students took a test. This box-and-whisker plot shows the results.

Based on this data, would a score of 48 be considered an outlier? -> I refuse to answer that question on the grounds that I don't know the answer.

10. Elana is growing a plant on her windowsill. Every week she records its height in inches. This scatter plot displays her findings, and a line of best fit is drawn. Based on this plot, how high can she expect the plant to be at 15 weeks?

-> 8.5 in

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