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A financial planner wants to compare the yield of income and growth oriented mutual funds. Fifty thousand dollars is invested in each of a sample of 35 income-oriented and 40 growth-oriented funds. The mean increase for a two year period for the income funds is $1,100 with a standard deviation of $45. For the growth-oriented funds the mean increase is $1,090 with a standard deviation of $55. At the 0.01 significance level is there a difference in the mean yield of the two funds?
Finnish Furniture manufactures tables in facilities located in three cities- Reno, Denver, and Pittsburgh. The tables are then shipped to three retail stores located in Phoenix, Cleveland, and Chicago.
The average hourly wage last year for members of the hospital clerical staff in a large city was $6.32. The standard deviation of the population was $.54. This year a sample of 50 workers had an average hourly wage of $6.51. Test the claim at alph..
ssuming that the shipment includes 3% defectives, what is the probability that the shipment will be accepted? (Hint: Use the binomial distribution.)
Ten bolts were selected randomly from a production line and the diameter of each was measured. Why do these diameters not have a binomial distribution?
Multiple choice questions based on regression - dependent variable Y and an independent variable X is provided.
According to the U.S. Census Bureau, the mean household income in the United States in 2000 was $63,091 and the median household income was $50,054.
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations and variances of X and Y.
Using the .05 level, do the results support the researcher's theory? (a) Use the steps of hypothesis testing, (b) sketch the distributions involved.
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
Analysis of Variance (ANOVA) is used to test the equality of the means of three or more groups based on sample data. ANOVA is really a test of means even though it sounds like a test of variance.
The probability of going to college is 0.4. What is the probability that the proportion of women who go to college is greater than 50%.
Select a US citizen and a citizen of China at random, independently of one another. Determine the probability that both have type O blood?
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