7. 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 160...

7.

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 160 adults is considered.

(NOTE: For the following problems, write: '' GREATER THAN '', '' EQUAL TO '', '' LESS THAN '', or '' NOT ENOUGH INFORMATION '')

(a) The mean of the sampling distribution for X¯ is____________the mean of the population.

(b) The standard deviation of the sampling distribution for X¯ is ____________the standard deviation of the population.