From above probability plots, it is clear that the two sets of observations come from two independent normal populations.
Test for Two Variances: Soy Diet, Traditional Diet
Method
Null hypothesis
Sigma(Soy Diet) / Sigma(Traditional Diet) = 1
Alternative hypothesis Sigma(Soy Diet) / Sigma(Traditional Diet)
not = 1
Significance level Alpha = 0.05
Statistics
Variable
N StDev Variance
Soy Diet 6
0.548 0.300
Traditional Diet 6 0.501
0.251
Ratio of standard deviations = 1.094
Ratio of variances = 1.197
Test
Method
DF1 DF2 Statistic P-Value
F Test
(normal)
5 5
1.20 0.849
Since P-value>0.05 so we can assume that two population variances are same.
From above plot, we see that assumption of normality holds.
Test for Equal Variances: Test score versus Group
95% Bonferroni confidence intervals for standard deviations
Group N
Lower StDev Upper
Re-write 5 3.94553 7.30068 28.0996
Self-quiz 5 3.48988 6.45755 24.8544
Teach 5 4.61114 8.53229 32.8399
Bartlett's Test (Normal Distribution)
Test statistic = 0.28, p-value = 0.868
Levene's Test (Any Continuous Distribution)
Test statistic = 0.03, p-value = 0.966
Since p-value>0.05 so assumption of equal variance holds.
Independent -Samples t-test (Worth 15 points) Scenario: An article in the journal Applied Nutritional Investigation reported...
Independent Samples t-test (Worth 15 points) Scenario: An article in the journal Applied Nutritional Investigation reported the results of a comparison of two different weight-loss programs (Liao, 2007). In the study, obese participants were randomly assigned to one of two groups: (1) the soy group, a low-calorie group that ate only soy-based proteins or (2) the traditional group, a low-calorie group that received 2/3 of their protein from animal products and 1/3 from plant products. One of the dependent measures...
Independent Samples t-test (Worth 15 points) Scenario: An article in the journal Applied Nutritional Investigation reported the results of a comparison of two different weight-loss programs (Liao, 2007). In the study, obese participants were randomly assigned to one of two groups: (1) the soy group, a low-calorie group that ate only soy-based proteins or (2) the traditional group, a low-calorie group that received 2/3 of their protein from animal products and 1/3 from plant products. One of the dependent measures...
17. (Table: Diets) An article in the journal Applied Nutritional Investigation reported the results of a comparison of two different weight-loss programs (Liao, 2007). In the study, obese participants were randomly assigned to one of two groups: (1) the soy group, a low-calorie group that ate only soy-based proteins or (2) the traditional group, a low-calorie group that received two thirds of their protein from animal products and one third from plant products. One of the dependent measures collected was...
please answer all fill in the blank Keep the Highest: Attempts: /4.5 7. Comparing ANOVA and the t test for an independent-measures hypothesis test Aa Aa Suzanne Zeedyk, a developmental psychologist at Dundee University's School of Psychology, conducted a pilot study in which parents started a half-hour walk with their infants in a parent-facing or an away-facing stroller and then switched to the other type of stroller midway. Her results suggest that parents talked less to the babies, the babies...
Q2) Independent-Samples t-Test (15 points total) Help with H, I, J, K, L please! In a research project, researchers collected demographic and health data from a sample of elderly residents in the community. To examine any possible gender differences in their sample, they want to see if the females and the males differ significantly on the education level (number of years of formal schooling). The researchers are not predicting any direction in the possible gender differences so the hypotheses should...
Q1) Independent-Samples t Test (25 points total) A clinic specializing in eating disorders would like to evaluate the effectiveness of a nutritional training program on binge eating disorder (BED). A psychologist was hired to conduct a small study to examine the potential effect of nutritional training on number of binges per month. The psychologist recruited 10 patients in the clinic to participate in a nutritional training program and 12 patients in the clinic with similar demographics who do not participate...
Q2) Independent-Samples t-Test (15 points total) In a research project, researchers collected demographic and health data from a sample of elderly residents in the community. To examine any possible gender differences in their sample, they want to see if the females and the males differ significantly on the education level (number of years of formal schooling). The researchers are not predicting any direction in the possible gender differences so the hypotheses should be non-directional. They would like to run a...
A researcher was studying teachers' uses of technology in instruction. She drew four samples of high school teachers, one each from teachers of mathematics, English, science and history. She made certain that all teacher participants in the study were teaching in their field of certification and that all had between five and ten years of experience in that subject area. Each teacher completed the Teach with Tech scale (Nerdy & Frump, 2008) a self-report instrument that measures the use of...
please answer these for me. a dependent samples -test a one-way ANOVA a stay of conversation topic and references to oneself in conversation, subjects in two groups are their scores oi a self-monitoring scale. Subjects in Group A engage in conversation with a who taiks about a neutral topic, and those in Group B converse with a confederate who talks h a or d hitched by rsonal topic. The hypothesis is that the personal topic will encourage more references to...
6. The t test for two independent samples - One-tailed example using tables Aa Aa Most engaged couples expect or at least hope that they will have high levels of marital satisfaction. However, because 54% of first marriages end in divorce, social scientists have begun investigating influences on marital satisfaction. [Data source: This data was obtained from National Center for Health Statistics.] Suppose a counseling psychologist sets out to look at the role of economic hardship in relationship longevity. He...