1. Mean (Average) Score: The mean score would decrease. This is because the 13th test score of 64 is lower than his previous lowest score of 78. Adding a score that is lower than the current average will decrease the average.

2. Median Score: The median score could not be determined without knowing all of his test scores. The median is the middle value when all scores are arranged in ascending order. Without knowing the other scores, we cannot determine if the middle value has changed.

3. Mode Score: The mode score could not be determined without knowing all of his test scores. The mode is the most frequently occurring score. Without knowing the other scores, we cannot determine if the most frequent score has changed.

4. Range of Scores: The range would increase. The range is the difference between the highest and lowest scores. Since his 13th test score of 64 is lower than his previous lowest score of 78, the range of scores has increased.

5. Lowest Score: The lowest score would decrease. His 13th test score of 64 is lower than his previous lowest score of 78.

6. Highest Score: The highest score would remain the same. His 13th test score of 64 does not affect his highest score of 98.

Question

1. Mean (Average) Score: The mean score would decrease. This is because the 13th test score of 64 is lower than his previous lowest score of 78. Adding a score that is lower than the current average will decrease the average.

2. Median Score: The median score could not be determined without knowing all of his test scores. The median is the middle value when all scores are arranged in ascending order. Without knowing the other scores, we cannot determine if the middle value has changed.

3. Mode Score: The mode score could not be determined without knowing all of his test scores. The mode is the most frequently occurring score. Without knowing the other scores, we cannot determine if the most frequent score has changed.

4. Range of Scores: The range would increase. The range is the difference between the highest and lowest scores. Since his 13th test score of 64 is lower than his previous lowest score of 78, the range of scores has increased.

5. Lowest Score: The lowest score would decrease. His 13th test score of 64 is lower than his previous lowest score of 78.

6. Highest Score: The highest score would remain the same. His 13th test score of 64 does not affect his highest score of 98.

Knowee AI · Accepted Answer

1. Mean (Average) Score: The mean score would decrease. This is because the 13th test score of 64 is lower than his previous lowest score of 78. Adding a score that is lower than the current average will decrease the average.

2. Median Score: The median score could not be determined without knowing all of his test scores. The median is the middle value when all scores are arranged in ascending order. Without knowing the other scores, we cannot determine if the middle value has changed.

3. Mode Score: The mode score could not be determined without knowing all of his test scores. The mode is the most frequently occurring score. Without knowing the other scores, we cannot determine if the most frequent score has changed.

4. Range of Scores: The range would increase. The range is the difference between the highest and lowest scores. Since his 13th test score of 64 is lower than his previous lowest score of 78, the range of scores has increased.

5. Lowest Score: The lowest score would decrease. His 13th test score of 64 is lower than his previous lowest score of 78.

6. Highest Score: The highest score would remain the same. His 13th test score of 64 does not affect his highest score of 98.

Michael took 12 tests in his math class. His lowest test score was 78. His highest test score was 98. On the 13th test, he earned a 64. Select whether the value of each statistic for his test scores increased, decreased, or could not be determined when the last test score was added.

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