- 1 of 2 ID: MST.FET.P.ANOP.01.0040A [2 marks] Two friends, Helen and Harriet, have a coin. Helen spent all day flipping the coin thousands of times, and observed that it turned up heads 60% of the time. So Helen assigns a probability of 0.6 to the event that a head turns up. Harriet, who is unaware of Helen's flipping experiment, reasons that the coin has two sides, each side being equally likely to show up. So Harriet assigns a probability of 0.5 to the event that a head shows up. a) The process that demonstrated relative frequency probability was: O reasoning that the outcomes of the coin flip are all equally likely O flipping the coin many times and observing the outcomes O both reasoning that all outcomes are equally likely and observing the coin flips made b) A weakness with the probability assigned by Helen is that: O it must be wrong, the probability must be 1/6 O it is an estimate probability has nothing to do with how often an event is seen to occur - 2 of 2 ID: MST.FET.P.ANOP.02.0040A [1 mark] Four students attempt to describe the likelihood of an event. They all assign a probability to this event. The table to the right shows each student together with the probability that they have assigned. Student Probability Karen 0 Based only on this information, the student that must have made a mistake in assigning their probability is: Linda 0.5 O Miranda Miranda 1 Natalie OO Karen Natalie 2 O Linda