Answer (Choose 1 answer)
Multiple choices 38/50
An economist is interested in studying the incomes of consumers in a particular region. The population standard deviation is known to be $1000. A random sample of 50 individuals resulted in an average income of $15000. What total sample size would the economist need to use for a 95%confidence interval if the width of the interval should not be more than $100?
Next
A. n = 1537
B. None of the other choices is correct
C. n = 385
D. n = 40
E. n = 20
Let 20.025 1.96.
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