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Question: Design with Iron Refer to Exercise. How could you find out whether iron caused the higher death rates associated in this study with its use? Describe the design of a study assuming you had 200 women to work with. Assume that you do not have to study the women for 19 years but, rather, will look at them for a much shorter time period, perhaps one or two years.
Exercise: Iron and Death Rate In February 2012, the magazine Health After 50 reported on the Iowa Women's Health Study. Experts used a questionnaire to collect data from 39,000 women 55-69 years old concerning their dietary supplements. After 19 years they looked at death rates. Many of the supplements were associated with a higher risk of death, iron being the most notable: The higher the dose of iron taken, the higher the death risk. Does this study show that consumption of iron causes higher death rates?
The mean amount purchased by a typical customer at Churchill\'s Grocery Store is $23.50 with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the foll..
a) Make a 95% Confidence statement about the percentage of all men who smoke cigars
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Create a 95% confidence interval for proportion of highly educated women who left careers for family reasons and who wish to return to work.
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Suppose a random sample of 1,000 executives shows that 55% said they anticipate making a major career change. Can you reject the claim made by the magazine? What is the p-value?
The power transmission cable has a weight per unit length of 15 lb/ft . If the lowest point of the cable must be at least 90 ft above the ground, determine the maximum tension developed in the cable and the cable's length between A and B
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in determining the range of an acoustic source by triangulation one must accurately measure the time at which the
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