According to the Agile Software Development Manifesto, customer satisfaction is the primary measure of progress

If the consumer price index for the United States rises from 350 at the end of a year to 365 at the end of the next year, how much inflation was there in the United States during that year?

What will be an ideal response?

A company that receives the majority of its orders by telephone conducted a study to determine how long customers were willing to wait on hold before ordering a product. The length of waiting time was found to be a variable best approximated by an exponential distribution with a mean length of waiting time equal to 2.8 minutes (i.e. the mean number of calls answered in a minute is 1/2.8). What is

the probability that a randomly selected caller is placed on hold fewer than 7 minutes? A) 0.9990881 B) 0.0009119 C) 0.917915 D) 0.082085