1. "Given the information provided, what is the probability of obtaining a sample mean within +/- 2 of the population mean? Population information: mean = 400, and standard deviation = 45. Sample size is 350." A. 0.2033 B. 0.7967 C. 0.5934 D. 1.00 E. None of the other answers. 2. A sample size of 180 is selected from a population with the proportion equal to 0.55. The sample proportion has an expected value of __ and standard deviation of __. A. 61 and 4.55 B. None of the other answers. C. 55 and 0.0455 D. 0.55 and .0505 E. 0.61 and 0.0455 3. The coach of a running team thinks that 45% of athletes can run a mile in under 7 minutes . A simple random sample of 200 athletes will be used to estimate the proportion of those who can run a mile under that time. What is the probability the sample proportion will be between 0.40 and 0.50? A. 0.8444 B. -1.42 C. 0.0778 D. 1.42 0.9222