During each of two separate hour long intervals, 18 cars passed through a freeway checkpoint. The tables below give the distribution of speeds in miles per hour (mph) of the cars passing through the checkpoint during these intervals. 而血 Interval A Interval B Speed (mph) | Frequency 1 Speed (mph) | Frequency 58 58 3 59 14 59 3 60 2 60 4 61 61 62 62 2 Which of the following statements is true about the speeds of the cars passing through the checkpoint during these two intervals? The standard deviations of the speeds during these two intervals are equal. The standard deviation of the speeds in Interval A is greater than that of the speeds in Interval B. The standard deviation of the speeds in Interval B is greater than that of the speeds in Interval A (D intervals cannot be calculated with the information The standard deviations of the speeds during these two provided.

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