Group | ni | x̅i | S2i | ni*(Xi-Xgrand)2 | (ni-1)*S2i |
A | 9 | -0.28 | 1.4400 | 0.284 | 11.5200 |
B | 9 | 0.15 | 2.5600 | 0.574 | 20.4800 |
C | 10 | -0.17 | 8.4100 | 0.046 | 75.6900 |
grand mean= | -0.1025 | 0.9029 | 107.6900 | ||
SSTr | SSE |
from above mean square error =SSE/(N-k) =107.69/(28-3)= 4.3076
A study of three independent groups yielded the following results: Group N A 9 B 9 C 10 Overall 28 Mean SD -0.28 1.2 0....
A study of three independent groups yielded the following results: Group N A 9 B 9 C 10 Overall 28 Mean SD -0.28 1.2 0.15 1.6 -0.17 2.9 -0.10 Calculate the mean square error between groups.
The following results are from an independent-measures, two-factor study with n condition. 10 participants in each treatment Factor B Factor A 2 T 40 M=4.00 SS = 50 T=50 M = 5.00 SS = 60 T= 10 M 1.00 SS 30 T=20 M 2.00 SS 40 N = 40; G = 120; Σ? = 640 Use a two-factor ANOVA with α =。05 to evaluate the main effects and the interaction Source df MS Between treatments AxB Within treatments Total For...
1. When do we use an independent groups t-test? a. b. c. d. When we are comparing means from one sample that has been measured twice. When we are comparing means from two different samples. When we are comparing a sample mean to a population mean. When we are comparing two population means. 2. Which of the following is true regarding the use of t-tests for true experiments versus quasi-experimental designs? a. b. We use the same t-test whether it...
4. (Four parts; 13 marks in total) A study was conducted to assess the effect of gender on average math SAT scores for students applying to a particular math department. The "effect" of gender (or the gender effect) on average math SAT score is defined as the difference in average math SAT score between males and females (um -up). Assume all the required assumptions are satisfied. a) (2 marks) Referring to the output in Tables 1 and 2 below, is...
The following ANOVA model is for a multiple regression model with two independent variables: Degrees of Sum of Mean Source Freedom Squares Squares F Regression 2 60 Error 18 120 Total 20 180 Determine the Regression Mean Square (MSR): Determine the Mean Square Error (MSE): Compute the overall Fstat test statistic. Is the Fstat significant at the 0.05 level? A linear regression was run on auto sales relative to consumer income. The Regression Sum of Squares (SSR) was 360 and...
QUESTION 3 a) Researchers want to test the effect of three different diets on the weight gain in 2 week- Diet 2 16 old lambs. The following table records the weight gain by the lambs. Diet 3 15 10 17 Diet 1 16 21 18 At the 0.05 level of significance, assess that there is a difference in the weight gain for each of the diet. (16 marks) b) Ten plots, each 10.4 meters, were randomly chosen in a large...
Please answer all parts 10. Tukey's HSD test Aa Aa Sleep apnea is a disorder characterized by pauses in breathing during sleep. Children who suffer from untreated sleep apnea often have behavior problems, including hyperactivity, inattention, and aggression. A common treatment for pediatric sleep apnea is the surgical removal of enlarged tonsils and adenoids that are obstructing the airways Suppose researchers at a sleep clinic are interested in the effect of surgical treatment for pediatric sleep apnea on aggressive behavior....
1. We reject the null hypothesis only when: a. our sample mean is larger than the population mean. b. the p value associated with our test statistic is greater than the significance level of the test we have chosen. c. our sample mean is smaller than the population mean. d. the p value associated with our test statistic is smaller than the significance level of the test we have chosen. 2. In a study of simulated juror decision making, researchers...
You will then computea statistic from the raw date. You can find the p value associated with this statistic in the same manner by locating where would le within the row that corresponds to the appropriate degrees of freedom. If this value is below the a value, you will reject the nutrypothesis in favor of an alternative hypothesis, which states that the means are significantly different DATA ANALYSIS AND HYPOTHESIS TESTING Art wure of a well-designed experiment la replication, which...
10. The Beck & Watson article is a Group of answer choices quantitative study qualitative study 11. Beck & Watson examined participants' experiences and perceptions using what type of research design? Group of answer choices particpant obersvation phenomenology 12. Select the participants in the Beck & Watson study Group of answer choices Caucasian women with 2-4 children Caucasian pregnant women 13. In the Beck & Watson study, data was collected via a(n) Group of answer choices internet study focus group...