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A researcher investigated the effect of volume of background noise on participants' accuracy rates while performing a difficult task. He tested three groups of randomly selected students and obtained the following means and sums of
squares:
Low Volume Moderate Volume High Volume
X 61.5 65.5 48.25
n 4 5 7
Source Sum of Squares df Mean Square F
Between groups 652.16 _____ _____ _____
Within groups 612.75 _____ _____
Total 1264.92 _____
(a) Complete the ANOVA.
(b) At _ 5 .05, what is Fcrit?
(c) Report the statistical results in the proper format.
(d) Perform the appropriate post hoc tests.
(e) What do you conclude about this study?
(f) Compute the effect size and interpret it.
The manager of the greeting card section of Mazey's department store is considering her order for a particular line of Christmas Cards. Develop the payoff table for this decision situations.
For the control group, the mean was 70.3 and the standard deviation was 8.3. (a) Do beta-blockers reduce the pulse rate? State the hypotheses and do a t test.
Assumed to have 20 pounds of carry-on baggage, find the probability that his total is greater than 195 pounds. Round your answer to three decimal places.
two different sprays for rewaterproofing parkas are compared by treating 5 parkas with spray 1 and 6 with spray 2.
Operators are to answer telephone calls from customers in an average time of 0.1 minute or less, and either respond to or refer to the proper department within 0.5 minute.
the researchers found a significant difference between the two groups control and treatment for change in mobility of
Solving quadratic equations. Discriminant of a quadratic equation. Compute the value of the discriminant and give the number of real solutions to the quadratic equation.
Before getting into analyzing the data, let's consider the question of the pros and cons of doctors using ethics consultations with doctors, and other ethicists, trained to think and provide advice on ethical issues in healthcare.
Sketch the appropriate distribution, and locate the critical region for a = 0.05.
question 1 i. we are conducting a two tailed hypothesis test at a 1 significance level to test that the mean of a
Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical conclusion about the null hypothesis and final conclusion that addresses the original claim.
Describe a scenario related to the final project in which you would use repeated-measures ANOVA. Describe a scenario related to the final project in which you would use MANOVA.
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