The time between customer service calls to a computer-repair hotline follows an exponential distribution with an expectation of 2 minutes between calls. we collect calls for 40 minutes at random times during the month (a sample of size n=40). what is the probability that the mean of our sampling distribution will be greater than 2.2 minutes?

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

What is the y-intercept of the line given by the equation

Which of the following describes the symmetry of the graph of y = x3?