Assume a random sample of n = 5 measurements from a normal distribution. Compare the standard normal z-values with the corresponding t-values if you were forming an 80% confidence interval. (a) 1.96; 2.776 (b) 1.645; 2.132 (c) 2.576; 4.604 (d) 1.282; 1.53

The average heart beats 65 times per minute, which is equivalent to 3,900 times per hour (65 x 60 = 3,900). In a day, the heart beats \approx imately 93,600 times (3,900 x 24 = 93,600). Therefore, in a year, the heart beats \approx imately 34,164,000 times (93,600 x 365 = 34,164,000). Assuming an average human lifetime is 80 years, the heart would beat \approx imately 2,733,120,000 times (34,164,000 x 80 = 2,733,120,000) over the course of the lifetime.