2. Question 16, pg. 323 of Ch. 12. Note, do NOT answer the questions in the text book, just follow the 5 steps of hypothesis testing. 16. The school district would like to ascertain the effect of October's ending of daylight saving time on school attendance, because other schools have found that the extra hour of daylight in the morning makes it easier for some students to get to school. There are 14 schools in the district; it records the number of students absent on the last Thursday of daylight saving time and then again on the first Thursday of non-daylight saving time. The numbers of absences are listed in the table. Does the end of daylight saving time decrease school absence? Use the 5 steps of hypothesis testing. The data are in the table below.

v Why this Sha'aba X Page 22 - Chang X | C legacy-guide-pa x Edit Assignment X Edit Assignment X VitalSource Book X Mail - Widaad Zz X Academics | Prop X - X C https://bookshelf.vitalsource.com/reader/books/9781524908768/pageid/351 Finish update : Q AA RY ... Comprehending ... Behavioral Statistics Chapter 12 Exercises 323 EHAVIDRAL STATISTI Hurlburt 11. (Exercise 10 continued) Compute both the indepen School Before After Expand all | Collapse all dent-samples t and the dependent-samples t for the 39 39 Independent-samples t data. Which of these is significant (nondirectional, 21 17 Tests a =.05)? 24 21 24 24 ONQUIAWN 12.4 Dependent-samples t 312 12. (Exercises 10 and 1 1 continued) Suppose we shuf- 16 11 Test Eyeball-calibration fle the X, data. Does that change X, or s,? Suppose 23 17 we then shuffle the X2 data. Does that change X2 30 20 12.5 Connections 316 21 or s2? Does either of these shufflings change the 26 21 25 value of the pooled standard deviation Spooled? Does 10 18 Exercises for Chapter 12 320 either of these shufflings change the value of the 11 28 24 independent-samples t? 12 27 21 CHAPTER 13 Statistical 327 13 30 24 Power 13. (Exercises 10-12 continued) Suppose we shuffle 14 12 18 the X, data and then shuffle the X2 data. Does that CHAPTER 14 Inferences 351 About Two or More Means: change the value of the Di's? Does that change the 17. A politician admitted to his constituents that he had Analysis of Variance value of sp? Does that change the value of s? Does committed some indiscretions in his personal life that change the value of the dependent-samples t? and he is now trying to correct his past mistakes. He CHAPTER 15 Post Hoc 397 would like to know the effect this announcement Tests 14. (Exercises 10-13 continued) You should have con- cluded in Exercise 11 that the dependent t was has on voters. Perhaps his candor will increase CHAPTER 16 Measures of 425 significant. whereas the independent t was not. Can voter respect, but perhaps his admissions will focus