Question

for many years, a large book publisher has published an expansive series of introductory science books for the general public. the chief editor of the series has always encouraged her writers to write reasonably short books. the chief editor has some recollections regarding the mean and standard deviation of the pages of the books in the series. the chief editor takes a random sample of 20 books in the series. these books have a sample mean of 143 pages with a sample standard deviation of 33 pages.
the chief editors recollections are that the books published in the series have a population mean of 149 pages with a population standard deviation of 29 pages.
fill in the blanks below with the proper notation for the population mean, the population standard deviation, and the sample mean.
population mean: = 149 pages
population standard deviation: = 29 pages
sample mean: = 143 pages

Explanation:

In statistics, the population mean is denoted by $\mu$, the population standard deviation is denoted by $\sigma$, and the sample mean is denoted by $\bar{x}$.

Answer:

Population mean: $\mu = 149$ pages
Population standard deviation: $\sigma = 29$ pages
Sample mean: $\bar{x}=143$ pages