A study on the length of time a person brushes their teeth is conducted on a large population of adults. The mean brushing time is μ and the standard deviation is σ. A simple random sample of 210 adults is considered. (NOTE: For the following problems enter: " GREATER THAN ", " EQUAL TO ", " LESS THAN ", or " NOT ENOUGH INFORMATION ", without the quotes.) (a) The mean of the sampling distribution is the mean of the population. (b) The standard deviation of the sampling distribution is the standard deviation of the population. The scores of students on the SAT college entrance examinations at a certain high school had a normal distribution with mean μ=548.2 and standard deviation σ=28. (a) What is the probability that a single student randomly chosen from all those taking the test scores 552 or higher?