1 of 8 0-day streak

Experimental probability from observed frequencies

Question 1 of 8

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A class recorded the transport method used on a series of school days. The results from 20 records are shown in the table

Any category not listed had zero recorded results in this run

Let \(A\) be the event that the result is bike

(a)1 mark

Use the recorded frequencies to calculate the experimental probability that the result is bike

Experimental probability

Format: exact fraction or terminating decimal

(b)1 mark

Which statement correctly interprets the experimental probability for A from this run?

The observed estimate uses all 20 trials to estimate the probability that the result is bike. A different run may give a different estimate

The probability uses the number of result categories as its denominator, regardless of how many trials were recorded

The favourable count itself is the probability; no division by the trial count is needed