An Investor Wants To Estimate The Population Mean Earnings Of Stocks In The Fina

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
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