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Poverty and Dietary Calcium. Calcium is the most abundant mineral in the human body and has several important functions. Most body calcium is stored in the bones and teeth, where it functions to support their structure. Recommendations for calcium are provided in Dietary Reference Intakes, de- veloped by the Institute of Medicine of the National Academy of Sciences. The recommended adequate intake (RAI) of calcium for adults (ages 19-50) is 1000 milligrams (mg) per day. A simple random sample of 18 adults with incomes below the poverty level gave the following daily calcium intakes. 886 633 943 847 934 841 1193 820 774 834 1050 1058 1192 975 1313 872 1079 809
a. Find a 90% confidence interval for μ
b. Why is the confidence interval you found in part a. shorter than the one in Exvercise s 70?
d. Which confidence interval yields a more accurate estimate of μ? Explain your answer. graph similar to that shown in Fig, 8.6 on page 343 to display both confidence intervals
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Caselet on McDonald’s vs. Burger King - Waiting time
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
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Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
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