A study on the length of time a person brushes their teeth is conducted on a lar

Question

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 and the standard deviation is . A simple random sample of 170 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.

Explanation / Answer

Population Mean is equal to the sample mean but sample standard deviation is lesser than the population standard deviation because for sample , it is divided by square root of N

thus answers are:

1. EQUAL TO

2. LESS THAN

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.