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The percentage of alcohol in a certain compound may be considered as a random variable X with the following pdf
fX (x) = 20x^3 (1 - x), 0 < x < 1.
Suppose that the selling price of the above compound depends on the alcohol contents. Specifcally, if 1/3 < X < 2/3, the compound sells for 120 dollars/gallon otherwise it sells for 90 dollars/gallon. If the cost is 50 dollars/gallon, and the probability distribution of the net profit per gallon.
A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall.
Sat verbal scores are normally distributed with a mean of 426 and a standard deviation of 94. Use the Empirical Rule to determine what percent of the scores lie between 332 and 426.
Assume that the bricks used are randomly chosen from a population of bricks whose mean length is 10 inches and whose standard deviation is 1/32 inch.
A nurse at a local hospital is estimating the weight of infants. how large a sample must she select if she desires to be 95% confident that the true mean is within 3 ounces of the sample mean?
a river is rising at a rate of 3 inches per hour. if the river rises more than 2 feetit will exeecd flood stage. how
Find the mean lifetime of TV tubes. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
A) Please develop the Expected frequencies table based on the above information.
nissan sold three models of cars in north america in 1999 sentras maximas and pathfinders. of the vehicles sold 50 were
She collected the employee performance ratings recorded before and after workshop attendance and stored the paired ratings for all 35 in Perform.
Develop a scatter diagram for the data and write a brief summary.
Many different kinds of data can be modeled or measured easily using exponential and logarithmic functions. For example, consider ideal gases:
Does the data prove a significant difference in mean GPAs? GPA1 GPA for Randomly Selected Students in Four Business Majors.
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