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1. At your supermarket, the typical shopper spends $18.93 with a standard deviation of $12.52. You are wondering what would happen in a typical morning hour with 400 typical shoppers, assuming that each one shops independently. How likely it is that you will exceed $8,000 in total sales for all 400 shoppers.
2. You are evaluating two portfolios for your personal investment on the basis of their return. Portfolio A's yearly return is normally distributed with a mean of 0.05 and a standard deviation of 0.07. Portfolio B's yearly return is normally distributed with a mean of 0.04 and a standard deviation of 0.06. Based on this information, what is the probability that over the next year, the return on portfolio A is lower than the return on portfolio B?
From historical data, Harry's Car Wash estimates that dirty cars arrive at the rate of 10 per hour all day Saturday. With a crew working the wash line, Harry figures that cars can be cleaned at the rate of one every 5 minutes.
What is the probability that the student is both a sophomore and a history major?
Suppose a fast food restaurant wishes to estimate average sales volume for a new menu item. The restaurant has analyzed the sales of the item at a similar outlet and observed the following results:
Suppose that a random requisition is found to have been incorrectly entered. What is the probability that it was processed by data entry specialist 3?
In multi-choice test, each question has four options. Students wil get 10 points for each correct answer; lose four points for each incorrect answer; and receive no points for unanswered questions.
According to the U.S. Census Bureau, the mean household income in the United States in 2000 was $57,045 and the median household income was $42,148.
Based on comparing the computed statistic to the critical value which of the following is true and BMI for Boston residents is significantly different than 25.
At 95% level of confidence, can we conclude that the babies using the Gibbs product gained less weight?
Assume that a 95% confidence interval estimate of the population mean annual starting salary is required. What is the planning value for the population standard deviation?
a. Determine the sample proportion, p, of households with cellular telephones that can be used to access the Internet. b. If the population proportion is 0.40, determine the standard error of the proportion.
Compute mean and standard deviation for sample of N = 8 females and sample of N = 8 for males.
If they have a GPA that falls in the range between 2.50 and 3.50, what is their z score and percentage of the area do they fall in?
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