2. The discussion of random assignment experiments in the slides includesmodels both with and without two additional observable factors (X₁and X₂). In contrast, the discussion of natural experiments jumped im-mediately to the equation below (which includes these factors) withoutdiscussing an equation without the observable factors.AOUTCOME; = ßo + B₁TREATMENT; + ß2X1i + ß3X2i + €iWas this a mistake? What reasons are there for thinking that a naturalexperiment is more likely to benefit from the inclusion of additionalobservable factors than is a random assignment experiment? Explain.

It may not necessarily be a mistake, as both random assignment experiments and the natural…

Answered: Was this a mistake? What reasons are…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 10CYU

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What is an experiment?
What is an experiment? Give two examples.
A consumer agency wants to determine whether there is a major difference between the proportions of the two leading automobile models that need major repairs (more than $300) within two years of their purchase. A sample of 400 2-year owners of model 1 are contacted, and a sample of 500 2-years owners of model 2 are contacted. The numbers x1 and x2 of owners who report that their cars needed major repairs within the first two years are 53 and 78, respectively. Test the null hypothesis that no difference exists between the proportions in populations 1 and 2 needing major repairs against the alternative that a difference does exist. Use =0.10.
In a two-factor experiment with two levels of factor A and two levels of factor B, three of the treatment means are essentially identical and one is substantially different from the others. What result(s) would be produced by this pattern of treatment means? a. a main effect for factor A b. a main effect for factor B c. an interaction between A and B d. main effects for both A and B, and an interaction
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Kindly answer question d) , e) and f)
A survey was conducted in respect of marital status success in examination. Out of 2,000 persons who appeared for an examination, 80% of them were boys, and the rest were girls. Among 300 married boys 140 were successful. 1100 boys were successful among unmarried boys. In respect of 100 married girls 40 were successful, 200 unmarried girls were successful. Construct two separate nine-square tables, and find out the Yule's Coefficient of Association to discuss the association between marital status and passing of examination.
NIMBY. In March 2007, the Gallup Poll split a sampleof 1003 randomly selected U.S. adults into two groups atrandom. Half 1n = 5022 of the respondents were asked,“Overall, do you strongly favor, somewhat favor,somewhat oppose, or strongly oppose the useof nuclear energy as one of the ways to provideelectricity for the U.S.?”They found that 53% were either “somewhat” or “strongly”in favor. The other half 1n = 5012 were asked,“Overall, would you strongly favor, somewhat favor,somewhat oppose, or strongly oppose the constructionof a nuclear energy plant in your area as one of theways to provide electricity for the U.S.?”Only 40% were somewhat or strongly in favor. Thisdifference is an example of the NIMBY (Not In MyBackYard) phenomenon and is a serious concern topolicy makers and planners. How large is the differencebetween the proportion of American adults who thinknuclear energy is a good idea and the proportion whowould be willing to have a nuclear plant in theirarea? Construct and…
You are investigating the role of physical activity on heart disease and hypothesize that physical activity protects people from having a heart attack. While presenting these data to your colleagues, someone asks if you have considered “factor Z”, because “factor Z” is associates with physical activity and heart disease. Based on this information, “factor Z” is likely a: Group of answer choices Confounder Causal exposure Bias Error
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You may need to use the appropriate technology to answer this question. The Consumer Reports Restaurant Customer Satisfaction Survey is based upon 148,599 visits to full-service restaurant chains.t One of the variables in the study is meal price, the average amount paid per person for dinner and drinks, minus the tip. Suppose a reporter for a local newspaper thought that it would be of interest to her readers to conduct a similar study for restaurants located in her city. The reporter selected a sample of 8 seafood restaurants, 8 Italian restaurants, and 8 steakhouses. The following data show the meal prices ($) obtained for the 24 restaurants sampled. Italian Seafood Steakhouse $13 $16 $24 13 18 19 15 17 23 16 26 25 17 22 22 19 15 21 17 18 26 26 20 32 Use a = 0.05 to test whether there is a significant difference among the mean meal price for the three types of restaurants. State the null and alternative hypotheses. O Ho: Hitalian = HSeafood = Hsteakhouse H: Not all the population…
A survey was conducted to assess the preference of people to reopen LA economy after the extended lockdown due to Corona. Out of 340 males questioned 230 wanted to open the economy and 110 did not. Out of 290 females questioned 218 wanted to open the economy and 72 did not. Can we say that the two factors, gender and preference to open the economy, are related? Use alpha = .05.

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Was this a mistake? What reasons are there for thinking that a natural experiment is more likely to benefit from the inclusion of additional observable factors than is a random assignment experiment? Explain.