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Mathematics, 25.12.2019 01:31, pinkycupcakes3oxbqhx
Vitamin d, whether ingested as a dietary supplement or produced naturally when sunlight falls on the skin, is essential for strong healthy bones. the bone disease rickets was largely eliminated in england during the 1950s, but now there is concern that a generation of children more likely to watch tv or play computer games than spend time outdoors is at increased risk. a recent study of 2700 children randomly selected from all parts of england found 20% of them deficient in vitamin d. a. find a 98% confidence interval for the true percentage of english children that are vitamin d deficient. b. explain what your interval means in context. c. explain what "98% confidence" means in this context. d. do these data refute a pundit's claim that 25% of english children are vitamin d deficient?
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