8. The accompanying two-way frequency table appears in an article about marijuana use in college. Each of 440 college students was classified according to both frequency of marijuana use and parental use of alcohol and psychoactive drugs. Do the data suggest that parental usage and student usage are independent in the population from which the sample was drawn? Use a significance level of 0.01. Standard Level of Marijuana Usage Occasional Never Regular 40 Never Occasional 142 55 Parental Use of 68 45 51 Alcohol and Drugs Regular 10 11 19

Pages were randomly selected from The Bear and the Dragon by Tom Clancy, Harry Potter and the Sorcerer's Stone by J.K. Rowling, and War and Peace by Leo Tolstoy. The Flesch Reading Ease scores for those pages are listed below. Use a 0.05 significance level to test the claim that the three samples are from populations with the same mean. Clancy 58.2 73.4 73.1 64.4 72.7 89.2 43.9 76.3 76.4 78.9 69.4 72.9 Rowling 85.3 84.3 79.5 82.5 80.2 84.6 79.2 70.9 78.6 86.2 74.0 83.7 Part (B) Identify the test statistic and the P-value The test statistic F= The P-value is notation.) Tolstoy 69.4 64.2 71.4 71.6 68.5 51.9 72.2 74.4 52.8 58.4 65.4 73.6 (Round to four decimal places.) (Round to six decimal places. Do not use scientific

11. A manager of a department times how many hours each person works within her department.   43     42     24     50     41     28     47     47     39     59     29     31     39     42   What is the mean and median of the data? Group of answer choices Mean = 40.1;  Median = 41.5 Mean = 40.0;  Median = 42.5 Mean = 40;     Median = 42 Mean = 40.8;  Median = 47

The mean number of sick days an employee takes per year is believed to be about 10.5. Members of a personnel department do not believe this figure. They randomly survey ten employees. The number of sick days they took for the past year are as follows: 12; 4; 15; 3; 11; 8; 6; 8; 2; 9. Let x = the number of sick days they took for the past year. Should the personnel team believe that the mean number is ten?