www.Get800TestPrep.com 116. A phone manufacturer hires a tester to determine the average lifespan of their current phon model. The tester selects 200 phones at random from the phones produced that day and o that the life of the phone has a mean of 400 days with an associated margin of error of 72 days. Which of the following is the most appropriate conclusion based on these data? bae A) It is plausible that the mean life of all phones ever produced by the manufacturer is between 328 and 472 days. B) It is plausible that the mean life of all phones produced by the manufacturer that day is between 328 and 472 days. CVAII phones ever produced by the manufacturer have a life between 328 and 472 days. D) All phones produced by the manufacturer that day have a life between 328 and 472 days. 117. Which scatterplot shows a relationship that is appropriately modeled with the equation y = axº where a > 0 and b <0? A) By C) D) 118. The average (arithmetic mean) salary of employees at an advertising firm with P employees, in thousands of dollars, is 53, and the average salary of employees at an advertising firm with Q employees, in thousands of dollars, is 95. When the salaries of both firms are combined, the average salary in thousands of dollars is 83. What is the value of ? 53P 119. * Jessica has two cats named Mittens and Fluffy. Last year Mittens weighed 12 pounds, and Fluffy weighed 19 pounds. Fluffy was placed on a diet, and his weight decreased by 20%. Mittens weight has increased by 20%. By what percentage did Mitten's and Fluffy's combined weight decrease, to the nearest tenth of a percent? At least 6 Less than feet tall 6 feet tall 12 19 Male 3. 15 15 Female Total 34 120. * The incomplete table above classifies the number of students by height for the twelfth-grade students at Washington High School. There are twice as many male students that are less than 6 feet tall as there are male students that are at least 6 feet tall, and there are four times as many female students that are less than 6 feet tall as there are female students that are at least 6 feet tall. What is the probability that a randomly selected student that is at least 6 feet tall is female? 362