Exam (elaborations) Math 302 QUIZ 1

AMERICAN PUBLIC UNIVERSITY MATH 302 QUIZ 1 Part 2 of 3 - 4.0/ 6.0 Points Question 13 of 20 0.0/ 1.0 Points Click to see additional instructions A sample of 150 students at a State University was taken after the final business statistics exam to ask them whether they went partying the weekend before the final or spent the weekend studying, and whether they did well or poorly on the final. The following table contains the result. Did Well on Exam Did Poorly on Exam Studying for Exam 60 15 Went Partying 22 53 If the sample is a good representation of the population, what percentage of those who did poorly on the final exam should we expect to have spent the weekend studying? Place your answer in the blank, rounded to 2 decimal places. Do not use a percentage sign (%). For example, 44.44 would be a legitmate answer. 29.33 Answer Key:22.06 Question 14 of 20 0.0/ 1.0 Points Click to see additional instructions A sample of 150 students at a State University was taken after the final business statistics exam to ask them whether they went partying the weekend before the final or spent the weekend studying, and whether they did well or poorly on the final. The following table contains the result. Did Well in Exam Did Poorly in Exam Studying for Exam 60 15 Went Partying 22 53 Of those in the sample who did well on the final exam, what percentage of them went partying the weekend before the exam? Place your answer in the blank, rounded to 2 decimal places. Do not use a percentage sign (%). For example, 44.44 would be a legitimate answer. 29.33 Answer Key:26.83 Question 15 of 20 1.0/ 1.0 Points Click to see additional instructions The histogram below represents scores achieved by 250 job applicants on a personality profile. How many job applicants scored between 10 and 30? Place your answer in the blank. Do not use any stray symbols. For example, 123 would be a legitimate answer. 100 Answer Key:100 Question 16 of 20 1.0/ 1.0 Points Click to see additional instructions The following data are the base salaries, in thousands of dollars, of 50 chief executive officers for a sample of companies doing business with the state of Connecticut. That is, the first entry in the table below corresponds to a salary of $125,000. A copy of this data set can be found in the Excel Workbook called CEOS. 125 157 113 127 201 165 145 119 148 158 148 168 117 105 136 136 125 148 108 178 179 191 225 204 104 205 197 119 209 157 209 205 221 178 247 235 217 222 224 187 265 148 165 228 239 245 152 148 115 150 Find the median of the CEO salaries, in thousands of dollars, rounded to 2 decimal places. Do not use a dollar sign. Note: $177,760 should be recorded as 177.76. 160.00 CEOS Answer Key:160.00|170.00 Question 17 of 20 1.0/ 1.0 Points Click to see additional instructions A statistics professor has just given a final examination in his statistical inference course. He is particularly interested in learning how his class of 40 students performed on this exam. The scores are shown below. 83 84 81 73 75 What is the mean score on this exam? Place your answer, rounded to two decimal places in the blank. For example, 65.78 would be a legitimate entry. 80.40 Answer Key:80.40 Question 18 of 20 1.0/ 1.0 Points Click to see additional instructions The following data are the base salaries, in thousands of dollars, of 50 chief executive officers for a sample of companies doing business with the state of Connecticut. That is, the first entry in the table below corresponds to a salary of $125,000. A copy of this data set can be found in the Excel Workbook called CEOS. 125 157 113 127 201 165 145 119 148 158 148 168 117 105 136 136 125 148 108 178 179 191 225 204 104 205 197 119 209 157 209 205 221 178 247 235 217 222 224 187 265 148 165 228 239 245 152 148 115 150 Find the interquartile range of the CEO salaries, in thousands of dollars, rounded to 2 decimal places. Do not use a dollar sign. Note: $177,760 should be recorded as 177.76. 68.74 CEOS Answer Key:68.00|74.00 Part 3 of 3 - 1.0/ 2.0 Points Question 19 of 20 1.0/ 1.0 Points The time required to drive from Detroit to Lansing is an example of a discrete random variable. True False Answer Key:False Question 20 of 20 0.0/ 1.0 Points Phone numbers, Social Security numbers, and zip codes are examples of numerical variables True False Answer Key:False