Question:

A researcher wants to test whether production errors differ by time of day (Day, Evening, and Nigh shift). She randomly assigns a group of accountants to each of three different shifts and measures the number of errors they make per month. She obtains the following results:

Test for a difference at ? = .05

Day

?X = 11

?2 =23

n = 6

Evening

?X=27

?2=163

n = 6

Night

?X=36?

?2=273

n = 6

STEP 1: State the null and alternative hypotheses. (2 points)

STEP 2: Set up the criteria for making a decision. That is, find the critical value.(1 point)

STEP 3: Compute the appropriate test-statistic. Show your work! (12 points)

(I have computed SStot for you)

Rows: Source Between Within Total

Columns: SS df MS F

SS of within: 101.3

STEP 4: Evaluate the null hypothesis (based on your answers to the above steps).(1 point)

STEP 5: Based on your evaluation of the null hypothesis, what is your conclusion?(1point)

A. Based on your decision about the null in the previous problem, is it appropriate to conduct a post-hoc test? (1 point)

B. Calculate the magnitude of effect for the p

A researcher wants to test whether production errors differ by time of day (Day, Evening, and Nigh shift). She randomly assigns a group of accountants to each of three different shifts and measures the number of errors they make per month. She obtains the following results:

Test for a difference at ? = .05

Day

?X = 11

?2 =23

n = 6

Evening

?X=27

?2=163

n = 6

Night

?X=36?

?2=273

n = 6

STEP 1: State the null and alternative hypotheses. (2 points)

STEP 2: Set up the criteria for making a decision. That is, find the critical value.(1 point)

STEP 3: Compute the appropriate test-statistic. Show your work! (12 points)

(I have computed SStot for you)

Rows: Source Between Within Total

Columns: SS df MS F

SS of within: 101.3

STEP 4: Evaluate the null hypothesis (based on your answers to the above steps).(1 point)

STEP 5: Based on your evaluation of the null hypothesis, what is your conclusion?(1point)

A. Based on your decision about the null in the previous problem, is it appropriate to conduct a post-hoc test? (1 point)

Question:revious problem and interpret what it means. (2 points)

\fPartial Question 3 2.67 / 4 pts Select each of the statements that are true: Both the Wilcoxon Signed Rank Test and the Sign Test ignore some of the sample information by not using the actual observed values to compute the test statistics. The Sign test tends to be less powerful than the Wilcoxon Signed Rank Test A statistician should always use the statistical test that results in the smallest p value. In some samples, analyses with different inference tools will draw similar conclusions.QUESTION 1 True or False: The blocking variable in randomized complete block design is always a random effects variable. True False QUESTION 2 True or false: Graeco-Latin square designs can be for any p greater than or equal to 3. True False(b) The ANOVA table below shows the result of an experiment using randomized complete block design. Source d.f. Treatment 498 Block M ND Error 108 Total 662 Using a = 0.05, test to determine whether there is sufficient evidence to indicate differences among, treatment means, block means .2. Steps in empirical economic analysis Use the following table to indicate the correctly ordered steps in conducting an empirical economic analysis to test an economic theory. Steps 1. Formulate the question of interest 2. Specify an econometric model 3. Construct a formal or informal economic model 4. Estimate model parameters using econometric methods 5. Collect data 6. State hypothesis in terms of model parameters In an empirical economic analysis, how does the econometric model relate to the economic model? Check all that apply. The economic theory is used to choose the variables in the economic model but not the variables in the econometric model. The econometric model attempts to account for the variables in the economic model that cannot be reasonably observed. The econometric model imposes a functional form on the more generally specified economic model. The econometric model is identical to the economic model