1.A sample of 57 observations will be taken from a process (an infinite population). The population proportion equals 0.15. The probability that the sample proportion will be less than 0.17 is (Round your answer to 4 decimal places.)
2. A random sample of 51 charge sales showed a sample standard deviation of $47. A 90% confidence interval estimate of the population standard deviation is (Round your answers to 2 decimal places.)