According to a poll about 19% of adults in a country bet in professional sports. data indicates that 47.9% of the adult population in this country is male
(a) assuming that betting is independent of gender compute the probability that an adult from this country selected at random is a male and bets in professional sports
(b) using the result in part (a) compute the probability that an adult from this country selected at random is male or bets if professional sports

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.