Assessment 3.docx - QUESTION 1 In a survey 598 out of 1,399...

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QUESTION 1 In a survey, 598 out of 1,399 US adults said they drink at least 4 cups of coffee a day. Find a point estimate (P) for the population proportion of US adults who drink at least 4 cups of coffee a day, then construct a 95% confidence interval for the proportion of adults who drink at least 4 cups of coffee a day. Choose one • 10 points P= 0.4247; (40.51%, 43.36%) P= 0.4274; (40.15%, 45.34%) Correct P= 0.4274; (40.57%, 44.92%) P= 0.4247; (39.34%, 46.15%) 10 QUESTION 2 A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year. Previous studies show that 35% of those people (21 to 35 year olds) interviewed go to at least 3 concerts a year. The researcher wants to be accurate within 2% of the true proportion. Find the minimum sample size necessary. Choose one • 10 points 2185 1539 Correct 2401 8740 0 QUESTION 3 The mean rent of a 3-bedroom apartment in Orlando is $1300. You randomly select 10 apartments around town. The rents are normally distributed with a standard deviation of $350. What is the probability that the mean rent is more than $1100?

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