ni gnirossi ni fiolmos bra fasisini sisdi ole or belles ban quedam siriqargomob ni gangflib aloodoe mol 10 enoughosob sonsmola i oldm gniwollot ofT .noimulia ross In Class-Practice with Central Tendency, ordi gnieU Variability, and z-Scores Initial doordo To oqYT dosd 101 "againAl holmod bru Jastoll to anousive biobasi2 bne enBoM (SHI=n) signs? 3. Now, convert the raw data into standardized data (z-scores). Record your responses in the table below. Use your sample from #2 and the following information: 10.S 2:12 wol - A loorlog 8E.A re. 232 sibbim - & looroe M=15 as. I BE.5 81.1 OIS 282 dgid - ) looks2 0= 5 TO. I SO. I BE.A sisvinT - alloordoe rigid=2 bris wol=I rhiw slave iniog-2 s no .B ( You need the highlighted data in order to find out the z-scores. You need population mean and population standard deviation.) to (2)ogys doidw .ofmi indi no beesEd .elevel lessomni bus hotmoo no loodoe dose to ansom eth Is Aoo J . I a ed guidosst ni berestsini som bas ni sidedolmos sTom ed blow verdi vse asdoses ob loorloz First, write out the formula for z-scores and then fill in the info below. isivsb biabriste bris tussin ord sbulori M zlooNoz X Z-score ur 10 "leoggua nouisiveb bisbrela 7 20 3 101 idgust bed vod nefis guidosol drew ilot verd boisgeng word no boysvie stew Projem noisoubad .& word .boisqiq womenxe = 2 bris bsisqeng lis is ton = [ iliw 2-I lo slane s no . bondas snow volT . InaY-9no grindonet 10 ashilson edt not mord gainsgeng ni bib amsigong noisisgeng isdosel night How :slamse gniwolfol edi fol *201092-8 bus , noitsivob bisbale . soasimov ,nsom ord) suitmojob 928919 Part 2 2 : A legions Wilson (2001) conducted a study comparing education majors' perceptions of working in urban schools as they entered teacher preparation programs to their perceptions after student teaching. Participants in the study were provided withdescriptions of four schools differing in demographic makeup and asked to rate their interest and comfort in teaching ; each situation. The following table includes information from education majors before they began teaching. Using the table, answer the following questions. Aliw 90198141-22810 al 297092-8 bas VilidsrisY Means and Standard Deviations of Interest and Comfort Ratings for Each Type of School, Initial Sample (n=112) Comfort Interest School led older ari mi esandgot wov M SD -s) stab boxibisbasse omni Mab SD NTO WOW .E School A - low SES 2.61 95 tousumotri gaiwollol 2.67 as S# 1.07 olqmise TOY School B - middle SES 4.50 .97 4.38 .89 School C - high SES 2.16 1.18 2.38 1.25 School D - Private 4.38 1.02 4.28 1.07 a. On a 5-point scale, with 1=low and 5=high 1 75bio ni Bisb boldgildgid erdt boon BOY) Cnousivsb bisbriste 1. Look at the means of each school on comfort and interest levels. Based on that info, which type(s) of school do teachers say they would be more comfortable in and more interested in teaching? Be sure to include the mean and standard deviation in your statement. norhi 101 Blum Template: Teachers indicate that they would be most comfortable teaching in schools, M = SD = 51092-8 2. Which school type has the largest standard deviation for comfort and interest? What does the large standard deviation suggest? OS 3. Education majors were surveyed on how prepared they felt with teaching after they had taught for one-year. They were asked, on a scale of 1-5 with 1 = not at all prepared and 5 = extremely prepared, how well their teacher preparation programs did in preparing them for the realities of teaching. Please determine the mean, variance, standard deviation, and z-scores* for the following sample: Participant A : 5 Participant B : 4 Participant C: 4 Participant D: 1 a gainhow to anoilqooreq 'sloism noitsoube gansqmoo ybuie s boloubroo (100S) noaliw Participant E. 4 i mi alanqlathe'l guidoset insbute noffs enoilqsong word of emangorq noimageiq notlopes*The population information for this study is the following: u = 3.5, o =.50 Create a table to organize your information before you begin. Make sure to show your work, write down formulas, and label all answers! after the is A. State the wall hype C. SL Source: Groulx, J. (2001). Changing preservice teacher perceptions of minority schools. Urban Education, 36(60). the 4. A local poll relish comp on course for all first your students. This year a of the cuor going 16 first year he end of the semester and deviltion of o - 12, does the new onling course is significantly Kin a two-tailed test with a = 05. Power gou browsis All four steps and show your work! nice #8 for the steps. there a significant difference book is is the same and run the big are your answers fo hitulo of the standard1. In the z-test formula explain what is measured by M- / in the numerator. Ing boon boy bas 2. In the z-test formula, explain what is measured by the standard error in the denominator (aNn).on don ob doY JEST gle outfit .8 Clast boltono p d't wordw Mad at grigis olivib psion uny binode noigot fromme on the 3. Screen time and use of social media are related to negative mental health outcomes, including suicidal thoughts (Twenge, Joiner, Rogers, & Martin, 2018). In a national survey of adolescents, the mean number of depressive symptoms was / = 2.06, o = 1.00. Suppose the researchers recruit n = 25 participants and instruct them to visit friends and family instead of using social media. The researchers observe that the average number of depressive symptoms is M = 1.66 after the intervention. Test the alternative or research hypothesis that the treatment changed the number of depressive symptoms. Use a two-tailed test with a = .05. A. State the null hypothesis & state the alternative hypothesis: C. Sketch the distribution and locate the critical region for a = .05 D. Calculate the test statistic. E. What decision will you make about the null hypothesis? Will you reject the null or retain the null? 4. A local college requires an English composition course for all first year students. This year they are evaluating a new online version of the course. A random sample of n = 16 first year students is selected and the students are placed in the online course. At the end of the semester, all first year students take the same English composition exam. The average score for the sample is M=76. For the general population of first year students who took the traditional class, the exam scores form a normal distribution with a mean of / = 80. a. If the final exam scores for the population have a standard deviation of o = 12, does the sample provide enough evidence to conclude that the new online course is significantly different from the traditional course? Run a two-tailed test with a = .05. Note: go through all four steps and show your work! See #3 for the steps. b. If the population standard deviation is o = 6, is there a significant difference between the sample and population? Assume everything else is the same and run the test again. c. Compare your answers for part a and part b, explain how the magnitude of the standard deviation influences the outcome of a hypothesis test. 5. Explain what a Type I error is. 6. Explain what a Type II error is.7. If the alpha level is .01, what is the critical value for a two-tailed z - Test (this would be step 2 and you need your table to find this out. You also need to divide alpha in half since it's a two - tailed test.) mmonob off ni fong bubname or ed bewesom al tariw nisiqs .slutmot mot-s sift nl .s 8. If the alpha level is .01, what is the critical value for a one-tailed z- Test? (You do not need to divide alpha in half when it's a one-tailed test.) 9. If you get a z-statistic (from step 3), that falls in the critical region, should you reject or retain the null hypothesis? o plead Isinom ovitsgan of borski one sibem istood to san bun out nowme .& To youare Isnoblen ent .(3109 .minsM 8 219gol ,roniolognowD) eldawords leblaine 10. Compare and contrast the z - score and the z- test. In what ways are they similar? How are they different? o to bestent fimat bas almont nerv of mord loarmeni bris amaqhaweq es - iJango d. 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