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Breast-feeding mothers secrete calcium into their milk. Some of the calcium may come from their bones, so mothers may lose bone mineral. Researchers measured the percent change in bone mineral content (BMC) of the spines of 47 randomly selected mothers during three-months of breast feeding. The mean change in BMC was -3.587% and the standard deviation was 2.506%. Please show all of your work.
(a) Construct and interpret a 99% confidence interval to estimate the mean percent change in BMC in the population. (use the 4-step process: State. Plan. Do. Conclude)
(b) Based on your interval from (a), do these data give good evidence that on the average nursing mothers lose bone mineral? Explain.
Find the area of the shaded region. Answer to the nearest tenth. Picture a square. The arcs have their centers at opposite vertices of the square and that is the region that is shaded.
The sample proportion of large gloves for each location is and . (Round your answers to 4 decimal places.)
according to government data 25 of employed women have never been married.a if 10 employed women are selected at
consider the following sample of seven chemical yields801814784836820901853use this sample to test that the population
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ph in the water is 7 at the .05 significance level. Her alternative hypothesis is that the water does not have a pH of 7. For which p-value will she fail to reject the null hypothesis?
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In the publication Employment and Earnings, information on the ages of people in the civilian labor force was published. Seventy-five people in the civilian labor force are randomly selected.
Based on this sample information find out what percent of variation in starting salaries is described by GPA, and find out the equation that would forecast salary from GPA. Give a scatter plot.
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By using the age midpoints x and the percentages of nurses, do we have a valid probability distribution? Describe.
Find the probability that the first marble drawn was blue given that the second marble drawn was red and what is the range space RY of this new random variable Y and give the probability distribution of Y in tabular form
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