# Question: Suppose the waiting time to get food after placing an

Suppose the waiting time to get food after placing an order at a fast- food restaurant is exponentially distributed with a mean of 60 seconds. If a randomly selected customer orders food at the restaurant, what is the probability that the customer will wait at least:

a. 90 seconds?

b. Two minutes?

a. 90 seconds?

b. Two minutes?

## Answer to relevant Questions

Net interest margin— often referred to as spread— is the difference between the rate banks pay on deposits and the rate they charge for loans. Suppose that the net interest margins for all U. S. banks are normally ...Marketing researchers often use city blocks as clusters in cluster sampling. Using this fact, explain how a market researcher might use multistage cluster sampling to select a sample of consumers from all cities having a ...The year 1987 featured extreme volatility on the stock market, including a loss of over 20 percent of the market’s value on a single day. Figure 7.6 (a) shows the percent frequency histogram of the percentage returns for ...Find the mean of each sample in Exercise In each of the following cases, find the mean, variance, and standard deviation of the sampling distribution of the sample proportion a. p =.5, n = 250 b. p =.1, n = 100 c. p =.8, n =400 d. p =.98, n =1,000Post your question