Solution Library


Calculation of Variance and Standard Deviation for Texas Lottery Ticket

Question During the holiday season, the Texas lottery has a scratch-off game called "Stocking Stuffer". One dollar is required to play the game and ticket prizes range from $1.00 to $1000.00. The probability of winning each prize is given below. PRIZE         ... Read More

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Estimation of Regression Equation to Predict the Buy Again Rating

The Tire Rack, America’s leading online distributor of tires and wheels, conducts extensive testing to provide customers with products that are right for their vehicle, driving style, and driving conditions. In addition, the Tire Rack maintains an independent consumer survey to help drivers he ... Read More

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Regression Equation to Predict Buy Again Rating

The Tire Rack, America’s leading online distributor of tires and wheels, conducts extensive testing to provide customers with products that are right for their vehicle, driving style, and driving conditions. In addition, the Tire Rack maintains an independent consumer survey to help drivers he ... Read More

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During the holiday season, the Texas lottery has a scratch-off game called "Stocking Stuffer"

Question During the holiday season, the Texas lottery has a scratch-off game called "Stocking Stuffer". One dollar is required to play the game and ticket prizes range from $1.00 to $1000.00. The probability of winning each prize is given below. PRIZE         ... Read More

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Computer Chip Manufacturing Company and Lowering Defect Rate

Question A company manufacturing computer chips finds that 8% of all chips manufactured are defective.  Management is concerned that high employee turnover is partially responsible for the high defect rate.  In an effort to decrease the percentage of defective chips, management decides to ... Read More

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Estimating True Proportion with 98 Percent Confidence

Question A company manufacturing computer chips finds that 8% of all chips manufactured are defective.  Management is concerned that high employee turnover is partially responsible for the high defect rate.  In an effort to decrease the percentage of defective chips, management decides to ... Read More

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Average Life Expectancy and ABI Insurance Tracking 

Question Insurance companies track life expectancy information to assist in determining the cost of life insurance policies.  Last year the average life expectancy of all policy holders that were paid out was 77 years.  ABI Insurance wants to determine of their clients now have a longer l ... Read More

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Estimating of True Mean having 98 Percent Confidence

Question Insurance companies track life expectancy information to assist in determining the cost of life insurance policies.  Last year the average life expectancy of all policy holders that were paid out was 77 years.  ABI Insurance wants to determine of their clients now have a longer l ... Read More

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Creating Classifier Data using Logistic Regression

Question The director of the MBA program at Salterdine University wants to develop a procedure to determine which applicants to admit to the MBA program. The director believes that an applicant’s undergraduate grade point average (GPA) and score on the GMAT exam are helpful in predicting whic ... Read More

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Probability of Success of Happy Harrys Hamburgers

Question Happy Harry's Hamburgers recently commissioned a top tier consulting company to develop a new location selection process. However, after receiving the first invoice from the consulting company, Happy Harry wasn't... happy that is, and he decided to cancel the remainder of the engagement. ... Read More

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Probability of Defective Lightbulbs in a Sample of 40

Question If the probability of a defective light bulb is 0.06, to be 98 % confident, up to how many defective lightbulbs should you expect in a sample of 40 lightbulbs? Summary This question belongs to statistics and discusses about probability of finding defective lightbulbs. Word count: NA &n ... Read More

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Vendor Stock for Hot Dog Concession at Safeco Field

Question A hot dog concession at Safeco Field sells an average of 33.2 hot dogs per hour (believed to follow a Poisson Distribution). How many hot dogs should the vendor stock in order to be 93% sure it has enough hot dogs for 2.5 hour(s)? F^-1(0.93)=   X=90   Summary This question ... Read More

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