John runs a computer software store. Yesterday he counted 126 people who walked by the store, 65 of whom came into the store. Of the 65, only 26 bought something in the store.

(a) Estimate the probability that a person who walks by the store will enter the store. (b) Estimate the probability that a person who walks into the store will buy something. (c) Estimate the probability that a person who walks by the store will come in and buy something. (d) Estimate the probability that a person who comes into the store will buy nothing.

(a) Estimate the probability that a person who walks by the store will enter the store. Recall that the probability of an event based on relative frequency is given by the formula probability of event = relative frequency = -, where f is the frequency of the event occurrence in a sample of n observations. The event of interest is that a person walking by the store enters the store. To estimate this probability, apply the formula. P(person walking by the store enters the store) = _number of people who enter the store number of people walking by the store The probability can be estimated using the data John gathered. Yesterday he counted 126 people walking past the store, 65 of whom came into the store. Apply these values and round the final estimation to two decimal places. P(person walking by the store enters the store) = number of people who enter the store number of people walking by the store 126