A random sample of 30 males between ages 25 – 40 is taken for a health and fitness study. Following are their wieghts in kilograms: 75, 72, 83, 76, 65, 88, 67, 76, 78, 89, 86, 74, 78, 89, 88, 78, 77, 83, 84, 69, 72, 74, 78, 75, 61, 86, 85, 84, 81, 79 It was also asked of them if they exercise daily, and only 13 of them answered yes. Based on the above sample data: (a) What can you conclude about the average weight of males aged 25 – 40 years at 90% confidence level? (b) What is the interval for average weight of this population if you want to make a claim at 98% confidence level? (c) What is the proportion of this population that exercises daily? Give a 95% confidence interval.

solve for w 2w2 +18w+28=(w+7)2

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A New York Times article titled For Runners, Soft Ground Can Be Hard on the Body considered two perspectives on whether runners should stick to hard surfaces or soft surfaces following an injury. One position supported running on soft surfaces to relieve joints that were in recovery from injury. The second position supported running on hard surfaces since soft surfaces can be uneven, which may make worse those injuries a soft surface was intended to help. Suppose we are given sufficient funds to run an experiment to study this topic. With no studies to support either position, which of the following hypotheses would be appropriate? The first position is more sensible, so this should be a one-sided test. In this case, we should form the alternative hypothesis around the second position. The second position makes the more sense, so this should be a one-sided test. In this case, we should form the alternative hypothesis around the first position. Because we would be interested in any…

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what do part b and part f say? I'm unsure what all the words say.