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Question 1 In a survey of 2,307 adults, 700 say they believe in UFOs. Construct a 90% confidence interval for the population proportion of adults who believe in UFOs. Question 2 A random sample of 144 soybean plants from our field has a sample mean of 38.8 pods/plant with a sample standard deviation of 3.6. Construct a 95% confidence interval for our yield. Question 3 For a confidence level of 90% with a sample size of 17, find the critical t value.

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