Bone loss by nursing mothers [Chapter 16]. Breastfeeding 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 mineral content of the spines of 47 nursing mothers during three months of breastfeeding. Use the Minitab output provided below and find a 99.5% confidence interval to estimate the mean percent change in mineral content in the population of nursing mothers. Suppose that this percent change in the population has standard deviation o = 2.5%.
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
STATE:
PLAN:
-level C:
-method used:
SOLVE: Check all conditions. Show all formulas used, with the correct values filled in. Report estimate to 0.01%. Label the Normal density curve based on the sampling distribution of x bar that underlies the procedure used.
CONCLUDE:
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