10/30/2015TheAceStudent: The power of the t test increases with | Complete Solution The power of the t test increases with | Complete Solution The power of the t test increases with | Complete Solution 1. The power of the t test increases with ____. increases in N increases in the effect of the independent variable decreases in the sample variance(s) all of the other three options 2. Having just made what you feel is to be a Type II error, using an independent groups design and a t test analysis, which of the following might you do in the next experiment to reduce the probability of a Type II error? increase N change to a correlated groups design try to reduce the variance by better experimental control all of the other three options 3. The t test for correlated groups requires that ____. the sampling distribution of is normally distributed N ³ 30 the population raw scores are normally distributed the sampling distribution of is normally is normally distributed 4. In the t test for independent groups, ____. we estimate µ1 µ2 we estimate s2 we estimate df = N – 1 5. Exhibit 141 A professor of women’s studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stressfree environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained. High stress 20 23 18 19 22 Relatively stress free 26 31 25 26 30 Refer to Exhibit 141. The obtained value of the appropriate statistic is ____. tobt = 4.73 tobt = 4.71 tobt = 3.05 tobt = 0.47 6. Exhibit 141 A professor of women’s studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stressfree environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained. High stress 20 23 18 19 22 Relatively stress free 26 31 25 26 30 data:text/html;charset=utf8,%3Ch3%20class%3D%22posttitle%20entrytitle%22%20itemprop%3D%22name%22%20style%3D%22margin%3A%200px… 1/7 10/30/2015 TheAceStudent: The power of the t test increases with | Complete Solution Refer to Exhibit 141. The df for determining tcrit are ____. 4 9 8 3 6. Exhibit 141 A professor of women’s studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stressfree environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained. High stress 20 23 18 19 22 Relatively stress free 26 31 25 26 30 Refer to Exhibit 141. Using a= .052 tail, tcrit= ____. +2.162 +2.506 ±2.462 ±2.306 7. Exhibit 141 A professor of women’s studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stressfree environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained. High stress 20 23 18 19 22 Relatively stress free 26 31 25 26 30 Refer to Exhibit 141. Using a= .052 tail, your conclusion is ____. accept H0; stress does not affect the menstrual cycle retain H0; we cannot conclude that stress affects the menstrual cycle retain H0; stress affects the menstrual cycle reject H0; stress affects the menstrual cycle 8. Exhibit 141 A professor of women’s studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stressfree environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained. High stress 20 23 18 19 22 Relatively stress free 26 31 25 26 30 Refer to Exhibit 141. Estimate the size of the effect.= ____ 0.8102 0.6810 0.4322 0.5776 9. Which of the following tests analyzes the difference between the means of two independent samples? correlated t test t test for independent groups sign test test of variance data:text/html;charset=utf8,%3Ch3%20class%3D%22posttitle%20entrytitle%22%20itemprop%3D%22name%22%20style%3D%22margin%3A%200px… 2/7 10/30/2015 TheAceStudent: The power of the t test increases with | Complete Solution 10. Which of the following is (are) assumption(s) underlying the use of the F test? the raw score populations are normally distributed the variances of the raw score populations are the same the mean of the populations differ the raw score populations are normally distributed and the variances of the raw score populations are the same 11. If its assumptions are met, the analysis of variance technique is appropriate when ____. two or more factors are varied several levels of a single independent variable are compared three or more groups are involved all of the other three options 12. sB2is a measure of ____. s 2 alone s 2 + the effects of the independent variable the variability between the means s 2 + the effects of the independent variable and the variability between the means 13. The total degrees of freedom for an experiment with n1= 10,n2= 12, and n3= 10 is ____. 2 32 31 29 14. Exhibit 153 Pertain to the following data. Group 1 4, 9, 10 Group 2 11, 11, 10 Group 3 1, 6, 4 Refer to Exhibit 153. What is the value of Fobt? 5.67 6.53 1.95 3.26 15. Exhibit 153 Pertain to the following data. Group 1 4, 9, 10 Group 2 11, 11, 10 Group 3 1, 6, 4 Refer to Exhibit 153. What is the value of Fcrit? Use a= 0.05. 5.14 4.76 4.46 4.07 16. Exhibit 153 Pertain to the following data. Group 1 4, 9, 10 Group 2 11, 11, 10 Group 3 1, 6, 4 Refer to Exhibit 153. What is your conclusion? Again use a = 0.05 retain H0 reject H1 data:text/html;charset=utf8,%3Ch3%20class%3D%22posttitle%20entrytitle%22%20itemprop%3D%22name%22%20style%3D%22margin%3A%200px… 3/7 10/30/2015 TheAceStudent: The power of the t test increases with | Complete Solution reject H0 accept H0 17. Exhibit 153 Pertain to the following data. Group 1 4, 9, 10 Group 2 11, 11, 10 Group 3 1, 6, 4 Refer to Exhibit 153. Using, the estimated size of effect is ____. 22.6% of the variability 52.8% of the variability 43.6% of the variability 55.1% of the variability 18. Exhibit 153 Pertain to the following data. Group 1 4, 9, 10 Group 2 11, 11, 10 Group 3 1, 6, 4 Refer to Exhibit 153. Using 2, what is the estimated size of effect? 0.7232 0.6852 0.6582 0.6312 19. What is the value of SST if SSB = 236 and SSW = 54? 290 182 4.37 100 20. By doing multiple t tests when there are more than 2 experimental groups we increase the risk of making what kind of mistake? accepting H0 Type I error Type II error all of the other three options 21. If X1=46, X2= 50, X3= 92 and n1=n2=n3, what is the value of Xg? cannot be determined from information given 50.0 188.0 62.67 22. If SSW= 126,N= 28,k= 4, then what is the value of sW2 cannot be determined from information given 5.25 42.0 4.667 23. If dfB= 3 and dfT= 29 and Fobt= 3.15, what would you conclude using a= 0.05? reject H0 reject H1 retain H0 retain H1 data:text/html;charset=utf8,%3Ch3%20class%3D%22posttitle%20entrytitle%22%20itemprop%3D%22name%22%20style%3D%22margin%3A%200px… 4/7 10/30/2015 TheAceStudent: The power of the t test increases with | Complete Solution 24. IfsB2= 27.9 andsW2= 54.2, what is the value ofFobt? impossible result, there must be an error 1.94 0.51 2.76 25. A priori comparisons ____. are planned in advance of the experiment often arise out of theory and prior research may be done without obtaining a significant Fobt in the oneway ANOVA all of the other three options 26. The sampling distribution of chisquare is ____. skewed varies with df is a theoretical distribution all of the other three options 27. The computation of fe____. is based on population proportion estimates is based on known population proportions is based on population means none of the other three options 28. If N= 18 and a= 0.052 tailed, the value of Tcrit is ____. 40 ±39 41 47 29. If a= 0.05, and df = 4, the value of c 2crit= ____. 9.488 0.711 7.815 11.070 30. Exhibit 171 Prior to a recent gubernatorial election, a survey was conducted to determine whether there was a relationship between sexual gender and preference for the Democratic or Republican candidate. The following data were recorded. Republican Female: 82 Democrat Female: 118 — 200 Republican Male: 68 Democrat Male: 132 — 200 –150 –250 –400 Refer to Exhibit 171. The value of c 2obt= ____. 2.06 2.09 1.80 1.75 31. Exhibit 171 Prior to a recent gubernatorial election, a survey was conducted to determine whether there was a data:text/html;charset=utf8,%3Ch3%20class%3D%22posttitle%20entrytitle%22%20itemprop%3D%22name%22%20style%3D%22margin%3A%200px… 5/7 10/30/2015 TheAceStudent: The power of the t test increases with | Complete Solution relationship between sexual gender and preference for the Democratic or Republican candidate. The following data were recorded. Republican Female: 82 Democrat Female: 118 — 200 Republican Male: 68 Democrat Male: 132 — 200 –150 –250 –400 Refer to Exhibit 171. The value of df = ____. 2 1 3 need more information 32. Exhibit 171 Prior to a recent gubernatorial election, a survey was conducted to determine whether there was a relationship between sexual gender and preference for the Democratic or Republican candidate. The following data were recorded. Republican Female: 82 Democrat Female: 118 — 200 Republican Male: 68 Democrat Male: 132 — 200 –150 –250 –400 Refer to Exhibit 171. Using a= 0.05,c 2crit= ____. 3.841 5.412 2.706 3.841 33. Exhibit 171 Prior to a recent gubernatorial election, a survey was conducted to determine whether there was a relationship between sexual gender and preference for the Democratic or Republican candidate. The following data were recorded. Republican Female: 82 Democrat Female: 118 — 200 Republican Male: 68 Democrat Male: 132 — 200 –150 –250 –400 Refer to Exhibit 171. Using a= 0.05, what is your conclusion? accept H0; there is no relationship between sex and candidate preference reject H0; there is a significant relationship between sex and candidate preference retain H0; the study does not show a significant relationship between sex and candidate preference retain H0; this study shows a significant relationship between sex and candidate preference 34. As the separation between the two groups of scores increases, Uobt ____. increases decreases stays the same approaches U¢obt 35. The statistics (U or U’) used in the MannWhitney U test, measure ____. the differences between the means of the two groups the direction of the differences between pairs of scores the power of the experiment the separation between the two groups 36. Using SPSS, the appropriate steps to analyze data for student’s t test for correlated groups are _________ Compare Means > Paired Sample t test > Before_C > After_C Analyze > Compare Means > Paired Sample t test > After_C > Before_C data:text/html;charset=utf8,%3Ch3%20class%3D%22posttitle%20entrytitle%22%20itemprop%3D%22name%22%20style%3D%22margin%3A%200px… 6/7 10/30/2015 TheAceStudent: The power of the t test increases with | Complete Solution Analyze > Compare Means > Paired Sample t test > Before_C > After_C Analyze > Compare Means > Before_C > After_C 37. In SPSS, the results of analysing data for student’s t test are displayed ____. in a graph in a number of tables as a stem and leaf in a histogram 38. In SPSS, the appropriate steps to analyze data for a oneway ANOVA are ____. you cannot perform ANOVA in SPSS OneWay ANOVA >Analyze > Compare Means Compare Means > OneWay ANOVA Analyze > Compare Means > OneWay ANOVA 39. In SPSS, when you follow the steps to perform oneway ANOVA, ____. you will not be given the option to compute “descriptive statistics” you will be given the option to compute “descriptive statistics” you will be given the option to compute “descriptive statistics”, but you have to open a new file you will be given the option to compute “descriptive statistics”, but you have to restart SPSS The power of the t test increases with | Complete Solution data:text/html;charset=utf8,%3Ch3%20class%3D%22posttitle%20entrytitle%22%20itemprop%3D%22name%22%20style%3D%22margin%3A%200px… 7/7
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