Question: Design with Calcium Refer to Exercise. How could you find out whether calcium caused the lower death rates associated in this study with its use? Describe the design of a study assuming you had 300 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, such as one or two years.
Exercise: Calcium and Death Rate 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. However, the consumption of calcium was associated with a lower death rate. Does this study show that consumption of calcium causes lower death rates?