<ol><li>The police chief of a town is trying to determine the average speed of drivers on a specific road.<ul><li>The police chief took a random sample of the speeds of 100 drivers on the road</li><li>The mean was 48.5 mph, with a standard deviation of 2.5 mph</li><li>The police chief wanted to decrease the margin of error of his next sample</li></ul></li></ol>Which choice would decrease the margin of error?(note: margin of error = 2 (1/sqrt(n)), where s is the standard deviation and n is the sample size) decreasing the sample size increasing the sample size changing the time that the data is collected changing the road on which the data is collected

<ol><li>A high school randomly selected 75 of the 200 seniors at the school to take a sample college entrance exam. The mean grade point average (GPA) of the seniors selected was 2.85, and the standard deviation was 0.4. Select all of the statements that are true.</li></ol>(note: margin of error = 2 (1/sqrt(n)), where s is the standard deviation and n is the sample size) The margin of error for the mean gpa is about 0.057 The margin of error for the mean gpa is about 0.092 The margin of error would decrease if the sample size were changed to 125 seniors The margin of error would increase if the sample size were changed to 125 seniors

NC MATH 3—RELEASED ITEMS Questions 1 and 2 are gridded response items that require you to write your answers in the boxes provided on your answer sheet. Write only one number or symbol in each box and fill in the circle in each column that matches what you have printed. Fill in only one circle in each column. What is the remainder when x3 – 1 is divided by (x + 2)? 2 The function