For a standard deck of playing cards, find the probability that a queen randomly selected from the deck is a diamond.

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)