# Question

A website manager has noticed that during the evening hours, about 3 people per minute check out from their shopping cart and make an online purchase. She believes that each purchase is independent of the others and wants to model the number of purchases per minute.

a) What model might you suggest to model the number of purchases per minute?

b) What is the probability that in any 1 minute at least one purchase is made?

c) What is the probability that no one makes a purchase in the next 2 minutes?

a) What model might you suggest to model the number of purchases per minute?

b) What is the probability that in any 1 minute at least one purchase is made?

c) What is the probability that no one makes a purchase in the next 2 minutes?

## Answer to relevant Questions

The manufacturer in Exercise 54 has noticed that the number of faulty cell phones in a production run of cell phones is usually small and that the quality of one day’s run seems to have no bearing on the next day. a) What ...An orthodontist has three financing packages, and each has a different service charge. He estimates that 30% of patients use the first plan, which has a $10 finance charge; 50% use the second plan, which has a $2 0 finance ...For the IQ test administered by human resources and discussed in Exercise 24, what cutoff value would separate the a) Lowest 0.15% of all applicants? b) Lowest 16%? c) Middle 95%? d) Highest 2.5%? In the Normal model N(100, 16) for IQ scores from Exercise 24, what cutoff value bounds the a) Highest 5% of all IQs? b) Lowest 30% of the IQs? c) Middle 80% of the IQs? d) Lowest 90% of all IQs? A survey of 200 middle managers showed a distribution of the number of hours of exercise they participated in per week with a mean of 3.66 hours and a standard deviation of 4.93 hours. a) According to the Normal model, what ...Post your question

0