Please answer all parts a-c. Thanks.
5 Boutique Store Consider a boutique store in a busy shopping mall. Every hour, a large number of...
In a shopping mall an average of 3 out of every 5 customers use visa credit cards. A sample of 10 customers is selected. Find the probability that exactly 6 customers use visa credit card. Find the probability that less than 9 customers use visa credit card. Now assume that a sample of 50 customers are selected. Find the smallest value of n such that P(X<n) ≥ 0.9, where the random variable X represents the number of customers who uses...
i need help thank you 1. A shopping mall estimates the probability distribution of the number of stores mall customers actually enter, as shown in the table x 0 1 2 3 4 5 6 7 8 P(x) 0.05 0.07 0.12 0.15 0.2 0.13 0.11 0.1 0.07 a. Find the mean and standard deviation of the number of stores entered. (10%) b. Refer to Question a Suppose that, on average, customers spend 10 in each store they enter. Find the...
5. A new shopping mall is considering setting up an information desk manned by one employee. Based upon information obtained from similar information desks, it is believed that people will arrive at the desk at a rate of 20 per hour. It takes an average of 2 minutes to answer a question. It is assumed that the arrivals follow a Poisson distribution and answer times are exponentially distributed. (a) Find the probability that the employee is idle. (b) Find the...
(1 point) You are interested in finding out the mean number of customers entering a 24-hour convenience store every 10-minutes. You suspect this can be modeled by the Poisson distribution with a a mean of = 3.59 customers. You are to randomly pick n = 57 10-minute time frames, and observe the number of customers who enter the convenience store in each. After which, you are to average the 57 counts you have. That is, compute the value of X...