Question

What is the appropriate statistical analysis to use: t-test for two independent samples, t-test for dependent...

What is the appropriate statistical analysis to use: t-test for two independent samples, t-test for dependent samples, ANOVA, or chi-square test of independence? Please identify and explain why it is appropriate. (a) A study was conducted to see whether monetary incentives to use less water during times of drought had an effect on water usage. Sixty single-family homeowners were randomly assigned to one of two groups: 1) monetary incentives and 2) no monetary incentives. At the end of three months, the total amount of water usage for each household, in gallons, was measured. (b) A study was conducted to see whether the mean weight loss is the same for 10 different weight loss programs. Each of the 10 programs had 50 subjects in it. The subjects were followed for 12 months. Weight change for each subject was recorded.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

a) In this study, there are two independent samples/groups - one with monetary incentives and other with no incentives. We need to find the difference in means of water usage between these two groups. Hence, we will use an independent samples t-test. The dependent variable is the water usage and the independent variable is the monetary incentive.

(B) In this study, we need to compare the mean weight change for each of the different 10 programs. As we have more than two independent groups here, we will use ANOVA to test the same. The Independent variable would be the type of program and the DV would be the weight change.

Answer: ANOVA

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A study of 10 different weight loss programs involved 500 subjects. Each of the 10 programs...
A study of 10 different weight loss programs involved 500 subjects. Each of the 10 programs had 50 subjects in it. The subjects were followed for 12 months. Weight change for each subject was recorded. The researcher wants to test the claim that all ten programs are equally effective in weight loss. (a) Which statistical approach should be used? (i) confidence interval (ii) t-test (iii) ANOVA (iv) Chi square (b) Explain the rationale for your selection in (a). Specifically, why...
Identify the appropriate statistical test for each research description: Single-sample z-test Single-samplet-test Independent samples t-test Related...
Identify the appropriate statistical test for each research description: Single-sample z-test Single-samplet-test Independent samples t-test Related samples t-test (repeated measures or matched samples) Correlation A researcher would like to determine whether an over-the-counter cold medication has an effect on mental alertness. A sample of n = 16 participants is obtained, and each person is given a standard dose of the medication one hour before being tested in a driving simulation task. For the general population, scores on the simulation task...
What is the appropriate test (e.g., Independent Samples T Test, Paired Samples T-Test, ANOVA, Correlation) and...
What is the appropriate test (e.g., Independent Samples T Test, Paired Samples T-Test, ANOVA, Correlation) and why (e.g., what type of variables are you analyzing)? What is the effect of living arrangements on the overall satisfaction at University.
What conditions are necessary in order to use the dependent samples t​-test for the mean of...
What conditions are necessary in order to use the dependent samples t​-test for the mean of the difference of two​ populations? Choose the correct answer below. A. Each sample must be randomly selected from any population and the two samples must be independent. B. Each sample must be randomly selected from any population and each member of the first sample must be paired with a member of the second sample. C. Each sample must be randomly selected from a normal...
For the following experiments/questions, pick the most appropriate statistical test. You have the following statistical tests...
For the following experiments/questions, pick the most appropriate statistical test. You have the following statistical tests as choices: some may be used more than once, others not at all.  Assume homogeneity of variance (where applicable) and the validity of parametric tests (where applicable), unless something is directly stated (e.g., “the data are not at all normal”) or otherwise indicated (viz., by the inspection of the data) which would indicate a strong and obvious violation of an assumption. This means you must...
For each of the following research questions, you will read an independent and dependent samples study...
For each of the following research questions, you will read an independent and dependent samples study to test that research question. Identify which study used independent and which used dependent samples. 4. How do psychosocial attitudes (those based on the interaction between the individual and the social environment) toward romantic love vary by race/culture? Study 1: Researchers hypothesized that cultures focused on group identity (collectivist) would place less emphasis on romantic love compared with cultures focused on individual identity (individualistic)....
Report 1) the appropriate statistical test or estimation procedure to use, 2) the null and alternate...
Report 1) the appropriate statistical test or estimation procedure to use, 2) the null and alternate hypotheses, 3) the test statistic, 4) the P value, 5) whether you accept or reject the null, then 6) a sentence or two about what the results mean. 1. A student conducted a study on food preference in 100 adult females. The study asked each adult if they preferred food that is salty or sweet. 65 answered salty and 35 answered sweet. Is there...
1.If the null hypothesis in a t-test for two samples is not rejected, what conclusion can...
1.If the null hypothesis in a t-test for two samples is not rejected, what conclusion can be drawn about the two means of the categorical variable? 2. . Assume you collected larger samples of individuals to test your null hypothesis in question #1. Specifically, the sample sizes increased to 200 subjects in each group. Do your results and conclusions change from the test of the smaller sample sizes? (You must show your work).
1. A researcher is comparing scores from two treatment groups using independent samples t test. Use...
1. A researcher is comparing scores from two treatment groups using independent samples t test. Use a Hartley’s F-max test to examine this assumption (each group has 6 participants, s2 in group 1 is 20, and s2 in group 2 is 15, set alpha level at .05). Also, how should this researcher estimate the standard error in the independent samples t test?
For the following experiment/question, pick the most appropriate statistical test. You have the following statistical tests...
For the following experiment/question, pick the most appropriate statistical test. You have the following statistical tests as choices: some may be used more than once, others not at all.  Assume homogeneity of variance (where applicable) and the validity of parametric tests (where applicable), unless something is directly stated (e.g., “the data are not at all normal”) or otherwise indicated (viz., by the inspection of the data) which would indicate a strong and obvious violation of an assumption. This means you must...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT