Homework Answers
The correct answers will be:
ANOVA is appropriate.
6 groups; 66 participants
significant result
needs a post hoc test, like Tukey
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F (5, 60)-5.13, p<.01 (Check all appropriate answers.) □ t Test is appropriate ANOVA is appropriate...
QUESTION 1 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the...
QUESTION 1 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the Bonferroni correction. If there were 4 groups (J = 4), what would your adjusted alpha value be for the post-hoc tests? Remember, our alpha is 0.05 for the class. Round final answers to four decimal places. QUESTION 2 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the Bonferroni correction. If there were 6 groups (J = 6), what would...
ANOVA Homework 1. How is an ANOVA different from a t-test? 2. When and why do...
ANOVA Homework 1. How is an ANOVA different from a t-test? 2. When and why do you use a post-hoc test? Indicate when you use a Fisher's test vs. a Tukey's HSD. 3. A researcher was interested in examining the decision making processes of people who work different shifts in a factory. They ask the participants from each shift to answer a set of questions regarding how they would deal with potential issues in the factory. Below are the scores...
To test whether students in a higher grade level will be less disruptive in class, a...
To test whether students in a higher grade level will be less disruptive in class, a school psychologist records the number of documented interruptions during one day of classes from nine local high schools. The sample consisted of nine (n = 9) freshman, sophomore, junior, and senior high school classes. The data for each high school class are given in the table. High School Class Freshman Sophomore Junior Senior 2 3 1 5 4 2 3 2 1 2 ...
In one tailed T-test, if the test statistics is
Question 2In one tailed T-test, if the test statistics is \(\mathrm{t}\) and \(\mathrm{t}_{0}\) is the t-value under null hypothesis, then \(\mathrm{p}\) -value \(=\operatorname{Pr}\left(\mathrm{t}<\mathrm{t}_{0} \mid\right.\) null hypothesis is true) if \(\mathrm{t}_{0}>0\) and p-value \(=\operatorname{Pr}\left(t>t_{0} \mid\right.\) null hypothesis is true) if \(t_{0}<0\).Question 3In a recent twin study from researchers at King's College London, the researchers wanted to first test whether identical twins show statistically significantly different thigh muscular power. To test this, they recruited 20 identical female twins. For this analysis,one-way ANOVA...
Below is the output from an ANOVA test Note that the degrees of freedom between groups...
Below is the output from an ANOVA test Note that the degrees of
freedom between groups is 2,
The degrees of freedom within is given to be 39, the F statistic
is given to be 3.33. and the p-value of
0.0461. (a) How many groups are there in this test? (b) What was
the sample size? (c) What is the conclusion of the test at the 5%
significance level?
An independent random sample is selected from an approxi- mately
normal...
a. Plot a histogram of each of the three groups. Do these data match the assumptions of an ANOVA? Explain. b.Do an appropriate hypothesis test to ask whether lifespan differs between the three groups...
a. Plot a histogram of each of the three groups. Do these data
match the assumptions of an ANOVA? Explain.
b.Do an appropriate hypothesis test to ask whether lifespan
differs between the three groups of flies (Hint: Kruskal-Wallis
Test). What is the p-value of this test?
c.Interpret the result of this test in one sentence.
1112223455 5 6 7 8 0 0 4 5 6 7 7 7880000000000000000 11111111112222222222222222 2 2-2 33 33 4 4 4 6 6 66 7...
please answer these for me. a dependent samples -test a one-way ANOVA a stay of conversation...
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...
Now suppose that the p-value from the ANOVA F-test turns out to be 0.003. All of...
Now suppose that the p-value from the ANOVA F-test turns out to be 0.003. All of the following statements are false. Explain why each one is false. a. The probability is 0.003 that the four groups have the same mean score. b. The data provide very strong evidence that all four fonts produce different mean scores. c. The data provide very strong evidence that the comic sans font produces a different mean score than the other fonts. d. The data...
F) (5 marks) Carry out the most appropriate test to determine if there are any significant differ...
f) (5 marks) Carry out the most appropriate test to determine if there are any significant differences in the mean velocity among the 8 different groups? SHOW ALL STEPS. Use a 5% significance level. g) (5 marks) What is the overall effect of ring (with O-ring vs. without O-ring) on the mean of velocity? First, define a linear contrast that will define the overall effect of ring on mean velocity. Then, calculate a 95% confidence interval for this effect. SHOW...
Q3) (20 Mark) A student's test score T is an integer between 0 and 100 corresponding...
Q3) (20 Mark) A student's test score T is an integer between 0 and 100 corresponding to the experimental outcomes s0; s1,., s100. A score of 90 to 100 is an A, 80 to 89 is a B, 70 to 79 is a C, 60 to 69 is a D, and below 60 is a failing grade of F. If all scores between 51 and 100 are equally likely and a score of 50 or less never occurs, find the...
QUESTION 1 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the Bonferroni correction. If there were 4 groups (J = 4), what would your adjusted alpha value be for the post-hoc tests? Remember, our alpha is 0.05 for the class. Round final answers to four decimal places. QUESTION 2 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the Bonferroni correction. If there were 6 groups (J = 6), what would...
ANOVA Homework 1. How is an ANOVA different from a t-test? 2. When and why do you use a post-hoc test? Indicate when you use a Fisher's test vs. a Tukey's HSD. 3. A researcher was interested in examining the decision making processes of people who work different shifts in a factory. They ask the participants from each shift to answer a set of questions regarding how they would deal with potential issues in the factory. Below are the scores...
Question 2In one tailed T-test, if the test statistics is \(\mathrm{t}\) and \(\mathrm{t}_{0}\) is the t-value under null hypothesis, then \(\mathrm{p}\) -value \(=\operatorname{Pr}\left(\mathrm{t}<\mathrm{t}_{0} \mid\right.\) null hypothesis is true) if \(\mathrm{t}_{0}>0\) and p-value \(=\operatorname{Pr}\left(t>t_{0} \mid\right.\) null hypothesis is true) if \(t_{0}<0\).Question 3In a recent twin study from researchers at King's College London, the researchers wanted to first test whether identical twins show statistically significantly different thigh muscular power. To test this, they recruited 20 identical female twins. For this analysis,one-way ANOVA...
Below is the output from an ANOVA test Note that the degrees of
freedom between groups is 2,
The degrees of freedom within is given to be 39, the F statistic
is given to be 3.33. and the p-value of
0.0461. (a) How many groups are there in this test? (b) What was
the sample size? (c) What is the conclusion of the test at the 5%
significance level?
An independent random sample is selected from an approxi- mately
normal...
a. Plot a histogram of each of the three groups. Do these data
match the assumptions of an ANOVA? Explain.
b.Do an appropriate hypothesis test to ask whether lifespan
differs between the three groups of flies (Hint: Kruskal-Wallis
Test). What is the p-value of this test?
c.Interpret the result of this test in one sentence.
1112223455 5 6 7 8 0 0 4 5 6 7 7 7880000000000000000 11111111112222222222222222 2 2-2 33 33 4 4 4 6 6 66 7...
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...
f) (5 marks) Carry out the most appropriate test to determine if there are any significant differences in the mean velocity among the 8 different groups? SHOW ALL STEPS. Use a 5% significance level. g) (5 marks) What is the overall effect of ring (with O-ring vs. without O-ring) on the mean of velocity? First, define a linear contrast that will define the overall effect of ring on mean velocity. Then, calculate a 95% confidence interval for this effect. SHOW...
Q3) (20 Mark) A student's test score T is an integer between 0 and 100 corresponding to the experimental outcomes s0; s1,., s100. A score of 90 to 100 is an A, 80 to 89 is a B, 70 to 79 is a C, 60 to 69 is a D, and below 60 is a failing grade of F. If all scores between 51 and 100 are equally likely and a score of 50 or less never occurs, find the...
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