Three projects were chosen to finish the same task. The following table showsthe average time (in hours) took for each project to complete the taskProject-120Project-228Project-3201926262422312327220 Use these data to test if the population mean times differ for the threeprojects. Level of significance is given as 0.5.(At the 0.5 level of significance, test for the equality of the means for project1 and 3 (using Fisher's LSD method).(in) Develop a 95% confidence interval estimate of the difference between themeans for projects 1 and project 2 (using Fisher's LSD method).Do NOT use EXCELal ) Do not reject the null hypothesis(There does not appear to be any significant difference() -8.54 to -1.46b) O Reject the null hypothesis) There does not appear to be any significant difference( 10.54 to-3.46aM Do not reject the null hypothesis(1) There does not appear to be any significant difference(iii) -10.54 to-3.46O) Reject the null hypothesis(ii) There does not appear to be any significant difference(i)-8.54 to -1.46(O e) None of the answers are correct

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Assuming the lowest decile of men receive an average of $800/month in Social Security, while the highest decile receive $2200/month in Social Security how much does each receive (on average) during their years in retirement. Use the chart called: Predictive Years of Receiving Social Security Benefits. Also use the born in 1940 data.
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In the context of the problem posed, interpret the results of the test at the 5% significance level and make a conclusion about the hypotheses.
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1.2. Consider the following ANOVA model of wages: WAGE, = B, + B, GENDER, + 4, where GENDER, is a dummy variable indicating whether individual i is male or female. Suppose a researcher specified GENDER, as equal to 1 if female and 2 if male. Do you see any problems with this specification? Explain.
Which of these formulas is correct? a. Differences in Means = Average Causal Effect - Selection Bias b. Selection Bias = Differences in Means * Average Causal Effect c. Differences in Means = Average Causal Effect + Selection Bias d. Selection Bias = Differences in Means / Average Causal Effect
Comment on the correlation between ‘Weight’ and ‘Performance.’
A group of researchers followed 10 firms from 2010 to 2022 to determine the effect of new tax policies on firms' performance: Firm ID = 1,...,10 Year = 2010,...,2022 I2010 = Investment during year in 2010 ... I2022 = Investment during year in 2022 F2010 = Real Value of the Firm in 2010 ... F2010 = Real Value of the Firm in 2022 What type of data set is this? a. time-series b. panel (longitudinal) c. none of the above d. cross-section
Conduct a hypothesis for whether consumption and income are linearly related using ? =0.01. The standard error of the slope is 0.144. Slope = 0.75, Intercept = 0, sample:Income 9, 11, 5, 8, 2, 9, 12Consumption 7, 7, 2, 7, 2, 8, 9 Step 1: State the null and alternative hypotheses.Step 2: Choose the significance level.Step 3: Calculate the test statistic.Step 4: Find the critical value(s).Step 5: Compare the test statistic to the critical value(s).Step 6: State the conclusion.
"Conservationists have despaired over destruction of tropical rain forest by logging, clearing, and burning." These words begin a report on a statistical study of the effects of logging in Borneo. Here are data on the number of tree species in 12 unlogged forest plots and 9 similar plots logged 8 years earlier: 22 18 22 20 15 21 13 13 19 13 19 15 17 4 18 14 18 15 15 10 12 Unlogged Logged Does logging significantly reduce the mean number of species in a plot? Assume equal population variances and use a = 0.05. Use the difference: logged - unlogged. 1. Test Stat: 2. Critical Region: a. T> -1.729 b. Tabs (-1.729) c. T abs (-1.729) 3. Conclusion: At 5% level of significance a. logging reduces the mean number of species in the plot b. there is no evidence that logging reduces the mean number of species in the plot

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