According to a 1992 study, adult body temperatures are norma…

According to a 1992 study, adult body temperatures are normally distributed with a mean of 98.20⁰ F and a standard deviation of 0.73⁰ F. What is the probability that a randomly selected sample of 25 adults has a mean body temperature of less than 98.15° F? 

According to a Pew Research Center survey, 30% of American a…

According to a Pew Research Center survey, 30% of American adults have used an online dating site. Six American adults are randomly selected and asked if they have used an online dating site. What is the probability that at most 5 have used an online dating site? 

According to a Pew Research Center survey, 30% of American a…

According to a Pew Research Center survey, 30% of American adults have used an online dating site. Six American adults are randomly selected and asked if they have used an online dating site. What is the standard deviation of the number who have used an online dating site for random samples of six American adults?