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In a test of the YSORT method of gender selection, 152 babies are born to couples trying to have baby boys, and 127 of those babies are boys. If the gender-selection method has no effect and boys and girls are equally likely, find the mean number of boys born in groups of 152. Round to the nearest whole number.
Calculate η 2 , the percentage of variance accounted for by treatment.
The lengths of 225 fish caught in Lake Michigan had a mean of 15.0 inches. Assume that the population standard deviation is 2.5 inches.
Assume the population standard deviations are not the same. At the .05 significance level, is there a difference in the mean waiting time?
What statistic (mean, median or mode) would you use to describe each aspect of the "typical" home? For example, you might use the MEAN for price, the MEDIAN for square footage.
If someone had x=2 job changes, what does the least squares line predict for y, the annual salary?
The given level of significance is an alpha of .005. Your MSA is 6,200 and your MSW is 1,000. Will you reject your null hypothesis that all population means are equal or will you not reject?
Assume that we know from previous studies that the population mean for minutes of exercise per week for college students is Uu= 100 with a standard deviation =25
Basic Statistics problem
The bank credit card department of Carolina Bank knows from experience that 5 percent of the card holders have had some high school, 15 percent have completed high school, 25 percent have had some college
How much net profit can John expect (on average) to earn from the store in total over the next five years?
The first unit produced after the calibration effort to be found to be defective. What is the probability that machine is in adjustment?
Describe what is measured by the estimated standard error in the bottom of the independent-measures t statistics.
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