The pulse rates of 140 randomly selected adult males vary from a low of 40 bpm to a high of 108 bpm. find the minimum sample size required to estimate the mean pulse rate of adult males. assume that we want 98%confidence that the sample mean is within 3 bpm of the population mean. find the sample size using the range rule of thumb to estimate sigma.

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126 a. the attendance was never the same at both plays. b. the attendance was the same on day 5. the attendance was 231 at both plays on that day. c. the attendance was the same on day 13. the attendance was 295 at both plays on that day. d. the attendance was the same on days 5 and 13. the attendance at both plays on those days was 231 and 295 respectively.