The population mean and standard deviation are given below. Find the indicated probability and determine whether a sample mean in the given range below would be considered unusual. If convenient, use technology to nd the probability. For a sample of n = 36, nd the probability of a sample mean being less than 12,750 or greater than 12,753 when u = 12,750 and a = 2.1. For the given sample, the probability of a sample mean being less than 12,750 or greater than 12,753 is (Round to four decimal places as needed) Would the given sample mean be considered unusual? O A. The sample mean would be considered unusual because there is a probability less than 0.05 of the sample mean being within this range. 0 B. The sample mean would be considered unusual because there is a probability greater than 0.05 of the sample mean being within this range. 0 C. The sample mean would not be considered unusual because there is a probability greater than 0.05 of the sample mean being within this range. 0 D. The sample mean would not be considered unusual because there is a probability less than 0.05 of the sample mean being within this range. Use the normal distribution of SAT critical reading scores for which the mean is 511 and the standard deviation is 121. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 650? (b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 575? (a) Approximately % of the SAT verba scores are less than 650. (Round to two decimal places as needed.) (b) You would expect that approximately SAT verbal scores would be greater than 575. (Round to the nearest whole number as needed.) A binomial experiment is given. Decide whether you can use the normal distribution to approximate the binomial distribution. If you can, find the mean and standard deviation. If you cannot, explain why. A survey of adults found that 52% have used a multivitamin in the past 12 months. You randomly select 50 adults and ask them if they have used a multivitamin in the past 12 months. . . . Select the correct answer below and, if necessary, fill in the answer boxes within your choice. O A. No, because nq