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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