question 1

For each variable, determine whether it is best thought of as discrete or continuous. Variable Discrete Continuous (a) The total amount of time that customers spend this week listening to telephone "hold" music O 0 while calling LBWPARCELS (b) The number of students, in a class of 35, who improve their score from the first midterm to O O the second midterm (c) The temperature of a burrito served to a customer in a local Mexican restaurant 0 Q (d) The number of personalinjury traffic accidents last week on Interstate 65 in Indiana O O Petroleum pollution in oceans stimulates the growth of certain bacteria. An assessment of this growth has been made by counting the bacteria in each 0f6 randomly chosen specimens of ocean water (of a fixed size). The 6 counts obtained were as follows. 46, 65, 54, 66, 70, 41 II: Send data to calculator) Find the standard deviation of this sample of numbers. Round your answer to two decimal places. (If necessary, consult a list of formulas.) [D xo'? A private college advertised that last year their freshman students, on average, had a score of 1200 on the college entrance exam. Assuming that average refers to the mean, which of the following claims must be true based on this information? Note: More than one statement could be true. If none of the statements is true, mark the appropriate box. Last year, the number oftheir freshman students who had a score of 1200 or above on the exam was equal to the X \\(3 ? number of their freshman students who had a score of 1200 or below on the exam. Last year all of their freshman students had a score of at least 1200 on the exam. Next year at least one of their freshman students will have a score of at least 1200 on the exam. Last year some of their freshman students had a score of less than 1000 on the exam. Last year some of their freshman students had a score of exactly 1200 on the exam. The tourist bureau of the Hawaiian Islands surveyed a sample of 5 United States tourists as they left to return home. The tourists were asked how many days they spent on their visits. Their responses were as follows. 12,10, 4, 8, 6 If Send data to calculator\") Find the standard deviation of this sample of numbers. Round your answer to two decimal places. (If necessary, consult a list of formulas.)