Question
1)A data set of unknown shape has a mean of 50 and a standard deviation of 10.At least what percent of values are between 20
1)A data set of unknown shape has a mean of 50 and a standard deviation of 10.At least what percent of values are between 20 and 80?
A.89%
B.75%
C.68%
D.Cannot be determined as distribution is unknown
2)It has been found that the probability that a shopper at a grocery store will buy soda is 0.7.The probability that a shopper will buy chips is 0.5.The probability that a shopper will buy soda or chips is 0.8.What is the probability that a shopper will buy soda and chips?
A.0.1
B.0.2
C.0.3
D.0.4
3)The probability of a recession next year is 0.4.Given that there is a recession there is a 0.8 probability that QT Toys will have a reduction in profits.If there is no recession the probability of reduced profits will be 0.2.What is the probability that QT toys will see a reduction in profits?
A.0.16
B.0.28
C.0.32
D.0.44
4)27 Names have been entered into a drawing where the first prize is $500.The 2ndprize is $250.The 3rdprize is $100.How many different ways can these prizes be awarded?
A.80,730
B.17,550
C.421,200
D.9,687,600
5)The following is a discrete probability distribution of cars sold daily at Mt. Fuji Used Car Sales. What is the average number of cars sold at this company each day?
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