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# A store is having a sale where winter clothes are of the original price a sweater is on

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expression to represent the total cost for 4 frames in two different ways
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ers paid another 6.2%. How much will someone earning \$34,000 a year pay towards social security out of their gross wages? 2) The population of a town increased from 3350 in 2005 to 4800 in 2010. Find the absolute and relative (percent) increase. 3)A company's sales in Seattle were \$400,000 in 2012, while their sales in Portland were \$295,000 for the same year. Complete the following statements: a. Seattle's sales were % larger than Portland's. b. Portland sales were % smaller than Seattle's. c. Portland sales were % of Seattle's. 4) A store has clearance items that have been marked down by 55%. They are having a sale, advertising an additional 30% off clearance items. What percent of the original price do you end up paying? 5) A friend has a 83% average before the final exam for a course. That score includes everything but the final, which counts for 15% of the course grade. What is the best course grade your friend can earn? % What is the minimum score your friend would need on the final to earn a 75% for the course? % Give answers accurate to at least one decimal place. 6) A car is driving at 50 kilometers per hour. How far, in meters, does it travel in 3 seconds? meters Give your answer to the nearest meter.
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, a standard deviation of \$1 would be considered large if it is describing the variability from store to store in the price of an ice cube tray. On the other hand, a standard deviation of \$1 would be considered small if it is describing store-to-store variability in the price of a particular brand of freezer. A quantity designed to give a relative measure of variability is the coefficient of variation. Denoted by CV, the coefficient of variation expresses the standard deviation as a percentage of the mean. It is defined by the formula CV = 100(s/ x ). Consider two samples. Sample 1 gives the actual weight (in ounces) of the contents of cans of pet food labeled as having a net weight of 8 oz. Sample 2 gives the actual weight (in pounds) of the contents of bags of dry pet food labeled as having a net weight of 50 lb. There are weights for the two samples. Sample 1 7.7 6.8 6.5 7.2 6.5 7.7 7.3 6.6 6.6 6.1 Sample 2 50.7 50.9 50.5 50.3 51.5 47 50.4 50.3 48.7 48.2 (a) For each of the given samples, calculate the mean and the standard deviation. (Round all intermediate calculations and answers to five decimal places.) For sample 1 Mean Standard deviation For sample 2 Mean Standard deviation (b) Compute the coefficient of variation for each sample. (Round all answers to two decimal places.) CV1 CV2
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