normally distributed group of weekly incomes of a large group of executives is.docx - The mean of a normally distributed group of weekly incomes of a

normally distributed group of weekly incomes of a large group of executives is.docx

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The mean of a normally distributed group of weekly incomes of a large group of executives is $1,000 and the standard deviation is $100. What is the z-score for an income of $1,100? A. 1.00B. 2.00C. 1.683D. -0.90 37. A new extended-life light bulb has an average service life of 750 hours, with a standard deviation of 50 hours. If the service life of these light bulbs approximates a normal distribution, about what percent of the distribution will be between 600 hours and 900 hours? A. 95%B. 68%C. 34%D. 99.7%

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