Final answer:
The distribution is negatively skewed because the mean is less than the median.
This correct answer is b.
Step-by-step explanation:
The distribution of the data given, having a mean of 89 and a median of 70, is negatively skewed.
In a negatively skewed distribution, the left tail of the distribution is longer, and the majority of the data is concentrated on the right side. This results in the mean being less than the median.
Therefore, option b. negatively skewed is the correct answer.
This correct answer is b.