Question
An investor wants to estimate the population mean earnings of stocks in the financial services sector. Assuming
the population standard deviation of earnings is σ=$1,250 {version:1.1,math:sigma = $1,250}, a confidence interval for which of the following would be best for this task?
Question 4 options:
μ {version:1.1,math:mu}, when σ {version:1.1,math:sigma} is known
μ {version:1.1,math:mu}, when σ {version:1.1,math:sigma} is unknown
The true mean of the differences, for paired data
The difference between two means, using independent samples
One proportion
The difference between two proportions
Linear regression
Statistics and Probability