Question 28 Previous QUESTION 17 An economist is interested in studying the monthly incomes of consumers in a particular region The population standard deviation of monthly income is known to be RM1000. A random sample of 55 individuals resulted in an average monthly income of RM15,000. What is the upper end point in a 99 % confidence interval for the average monthly income in this region? A) RM15,364 B) RM15.328 C) RM15,347 D) RM15 382 A.

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