B7. An estate agent wants to test whether mean house prices are the same regardless ofwhich of 3 air-pollution levels typically prevails in the area. A random sample of housepurchases in 3 areas yields the price data below:House purchase prices (in thousands of pounds)Pollution levelLow Moderate High12061406859554011073957545838064Construct an ANOVA table to test, at the 2.5% level of significance, whether meanhousing prices differ by level of pollution.Hint: You may need to use one of these percentiles, F2,12(2.5%) = 5.096, F12,2(2.5%) =39.415, F3,12(2.5%) = 4.474, F12,3(2.5%) = 14.337.%3D

The data shows the house purchases in 3 areas yields the price.

Answered: B7. An estate agent wants to test…

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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Q18. Why do we conduct post hoc analysis in ANOVA? a. To make a comparison on individual adjusted R-squares B. To make a comparison of the individual group meansC. To make a comparison of the individual group scatter plots D. None of the above
Refer to the accompanying data table, which shows the amounts of nicotine (mg per cigarette) in king-size cigarettes, 100-mm menthol cigarettes, and 100-mm nonmenthol cigarettes. The king-size cigarettes are nonfiltered, while the 100-mm menthol cigarettes and the 100-mm nonmenthol cigarettes are filtered. Use a 0.05 significance level to test the claim that the three categories of cigarettes yield the same mean amount of nicotine. Given that only the king-size cigarettes are not filtered, do the filters appear to make a difference? LOADING... Click the icon to view the data table of the nicotine amounts. Nicotine amounts (mg) Dialog content starts King-Size 100-mm Menthol 100-mm Nonmenthol Brand Nicotine (mg) Brand Nicotine (mg) Brand Nicotine (mg) 1 1.3 1 0.9 1 0.2 2 1.2 2 1.0 2 1.1 3 1.0 3 1.2 3 0.6 4 1.1 4 0.9…
"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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A hypertension trial is mounted and 12 participants are randomly assigned to receive either a new treatment or a placebo. Each participant takes the assigned medication and their systolic blood pressure (SBP) is recorded after 6 months on the assigned treatment. The data are as follows. Placebo New Treatment 132 114 143 119 148 121 144 124 155 126 160 128 Is there a difference in mean SBP between treatments? Run the test at a 5% level of significance. Give each of the following to receive full credit : 1) the appropriate null and alternative hypotheses; 2) the appropriate test; 3) the decision rule; 4) the calculation of the test statistic ; and 5) your conclusion including a comparison to alpha or the critical value. You MUST show your work to receive full credit. Partial credit is available.
1. A professor is interested in how attendance is related to grades her class. She goes through her records and determines each student’s final average and the number of days absent. The scores for her sample are given in the table below. a. Construct a scatter plot of the relationship between final averages and the number of days absent. b. Is there a significant relationship between final averages and the number of days absent? Calculate and interpret the correlation and report it in proper APA format. c. Compute r2 for the data. What percent of the variability in final averages is accounted for by the number days absent?
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Suppose the accompanying summary statistics for a measure of social marginality for samples of youths, young adults, adults, and seniors appeared in a research paper. The social marginality score measured actual and perceived social rejection, with higher scores indicating greater social rejection. Young Adults Age Group Youths Adults Seniors Sample Size 107 254 319 37 2.00 3.10 3.09 2.81 1.59 1.69 1.67 1.86 For purposes of this exercise, assume that it is reasonable to regard the four samples as representative of the U.S. population in the corresponding age groups and that the distributions of social marginality scores for these four groups are approximately normal with the same standard deviation. Is there evidence that the mean social marginality scores are not the same for all four age groups? Test the relevant hypotheses using a = 0.01. Calculate the test statistic. (Round your answer to two decimal places.) F = What can be said about the P-value for this test? O p-value > 0.100 O…
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Refer to the accompanying data table, which shows the amounts of nicotine (mg per cigarette) in king-size cigarettes, 100-mm menthol cigarettes, and 100-mm nonmenthol cigarettes. The king-size cigarettes are nonfiltered, while the 100-mm menthol cigarettes and the 100-mm nonmenthol cigarettes are filtered. Use a 0.05 significance level to test the claim that the three categories of cigarettes yield the same mean amount of nicotine. Given that only the king-size cigarettes are not filtered, do the filters appear to make a difference? Click the icon to view the data table of the nicotine amounts. Determine the null and alternative hypotheses. Ho H₁: an example Get more help - THI O BI acer *** Nicotine amounts (mg) to King-Size 100-mm Menthol Brand Nicotine (mg) Brand Nicotine (mg) 1 1 2 2 3 ^ 4 5 6 7 8 9 10 1.4 1.0 1.0 1.1 1.4 1.1 1.3 1.0 1.3 1.2 2 3 4 5 3 6 7 8 9 10 Print 1.1 0.9 1.1 0.8 1.2 1.4 0.9 1.2 1.4 0.8 100-mm Nonmenthol Brand Nicotine (mg) 1 2 Done 3 4 5 6- 8 9 10 0.9 1.1 0.5…
Refer to the accompanying data table, which shows the amounts of nicotine (mg per cigarette) in king-size cigarettes, 100-mm menthol cigarettes, and 100-mm nonmenthol cigarettes The king-size cigarettes are nonfiltered, while the 100-mm menthol cigarettes and the 100-mm nonmenthol cigarettes are fillered Use a 0.05 significance level to test the daim that the three categories of cigarettes yield the same mean amount of nicotine. Given that only the king-size cigarettes are not filtered, do the filters appear to make a difference? A Click the icon to view the data table of the nicotine amounts Nicotine amounts (mg) Determine the null and alternative hypotheses 100-mm Nonmenthol o King-Size Brand Nicotine (mg) Brand Nicotine (mg) Brand Nicotine (mg) 100-mm Menthol H, At least one of the three population means is different from the others 11 1.0 0.8 10 2 3. 11 Find the F test statistic 1.0 11 04 08 1.3 11 4 1.1 F=(Round to four decimal places as needed) 1.5 5 1.1 11 1.3 07 1.1 7. 10 13 8…
The following histogram shows the percentage of residential properties in negative equity or near negative equity for 114 states of a certain country for which data were available in July 2012. Complete parts (a) through (c) below. 35 30- 25 20 15 10 5- 0- 12.5 22.5 32.5 42.5 52.5 Percentage ..... O D. The overall shape is normal. (b) How many states had their percentage between 10% and 14.9%? 21 (Type a whole number.) (c) How many states had their percentage above 45%? (Type a whole number.) Kou anbas

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