Question

mrs. rodrigues wants to compare the spread of the test scores of her two biology classes. which statistic should she use? mean standard deviation median mode

Explanation:

Step1: Define each statistic

• Mean: Average value of data.
• Standard deviation: Measures spread of data from mean.
• Median: Middle - value of ordered data.
• Mode: Most frequent value in data.

Step2: Identify the right statistic

Since Mrs. Rodrigues wants to compare the spread of test - scores, standard deviation is the appropriate statistic as it quantifies how much the data points deviate from the mean, indicating the spread of the data set.

Answer:

B. standard deviation