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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
1. Data for the "plasters" experiment undertaken in week 2 (7/10/14) are available on Moodle. Eliminate one of the rows of data (i.e. one plaster type for one person) at random and specify in your response which one was removed.
Dave is a student and has a budget of $48 a month, which he spends on ra- men noodles (which cost $2 per package) and coffee (which cost $3 per bag).
The lifetime of a color television picture tube is normally distributed with the mean of 7.8 years and a standard deviation of 3 years.
Find the probabilities for the following discrete random variables and find the probability that the salad contains more than 5 vegetables on i) a given day and on ii)3 of the next 4 days?
Suppose the returns of a particular group of mutual funds are normally distributed with a mean of 12.4% and a standard deviation of 4.7%. If the manager of particular fund wants his fund to be in the top 5% of funds with the highest return, what ..
Temperature and air pollution are known to be correlated. We collect data from two laboratories, in Boston and Montreal. Boston makes their measurements of temperature in Fahrenheit, and Montreal in degrees centigrade. Boston measures pollution in..
Calculate an estimate of the difference between true average blood lead levels for male and female workers in a way that provides information about reliability and precision. (Use a 95% confidence interval. Round your answers to two decimal places..
question an education study gives information on the study mode full-time or part-time of students studying for a
At the .10 significance level, can we conclude that less than 88 percent of the orders are delivered in less than 10 minutes. What is the decision rule?
1. a state group is interested in whether voters would support lowering the legal drinking age to 18. a simple random
The Centers for Disease Control (CDC) indicate that the average height for girls at this age is 63.80 inches, with a standard deviation of 2.66 inches
What is the probability that more than 310 people in her sample will listen to music.
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