Question 5 (1 point) Suppose you work for a pharmaceutical company that is testing a new drug to treat ulcerative colitis. You conduct a random sample of 27 patients on the new drug and 10 of them indicated a decrease in symptoms since starting the drug regimen. You construct a 99% confidence interval for this proportion to be ( 0.1306 , 0.6101 ). What is the correct interpretation of this confidence interval? 0 1) We are certain that 99% of patients will be between 0.1306 and 0.6101. 2) We are 99% confident that the proportion of patients surveyed that have experienced a reduction in symptoms is between 0.1306 and 0.6101. 3) We are 99% confident that the proportion of patients who should be on this drug is between 0.1306 and 0.6101. 0 4) We are 99% confident that the proportion of all patients on the drug regimen that have experienced a reduction in symptoms is between 0.1306 and 0.6101. 0 5) We cannot determine the proper interpretation of this interval. Question 6 (1 point) Suppose you want to determine the average height of college basketball players in NCAA Division |. In a random sample of 14 players, the sample average is 74.251 inches with a standard deviation of 5.6756 inches. What is the 90% confidence interval for the average height of all NCAA D-I players? 0 1) (71.565, 76.937} 0 2) (72.43 , 76.022) 0 3) ( 71.53 , 76.922 ) O 4) (-71.565 , 76.937) 0 5) (72.734, 75.768}

Question 7 (1 point) The owner of a local supermarket believes the average number of gallons of milk the store sells per day is 228.2. In a random sample of 25 days, the owner finds that the average number of gallons sold was 237.5 with a standard deviation of 30.04. Using this information, the owner calculated the confidence interval of (220.7, 254.3) with a confidence level of 99%. Which of the following statements is the best conclusion? 0 1) The percentage of days on which more than 228.2 gallons of milk are sold is 99%. 2) We cannot determine the proper interpretation based on the information given. 0 3) We are 99% confident that the average number of gallons sold per day is less than 228.2. 0 4) The average number of gallons sold per day is not signficantly different from 228.2. 5) We are 99% confident that the average number of gallons sold per day is greater than 228.2. Question 8 (1 point) The owner of a local golf course wants to estimate the difference between the average ages of males and females that play on the golf course. He samples a group of men and women and then uses the sample statistics to calculate a 99% confidence interval of (-38.47, -19.11). This interval estimates the difference of (the average age of men - the average age of women). What can we conclude from this interval? 0 1) There is no significant difference between the average age of men and women that play at the course at 99% confidence. O 2) We are 99% confident that the average age of all men who play at the course is greater than the average age of all women. O 3) We do not have enough information to make a conclusion. 0 4) We are 99% confident that the difference between the two sample means falls within the interval. 0 5) We are 99% confident that the average age of all women who play at the course is greater than the average age of men.

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