Question

What do I do when my Welch test and Mann-Whitney tests have conflicting p-values/ interpretations? Independent...

What do I do when my Welch test and Mann-Whitney tests have conflicting p-values/ interpretations?

Independent Samples T-Test

Test

Statistic

df

p

Lead_Measured_(mg/kg)

Student

-2.048

90.000

0.044

Welch

-2.048

64.477

0.045

Mann-Whitney

920.500

0.285

Table 3. A Student, Welch, and Mann-Whitney t-test.

This is what I have collected from my data, and I do not know how to properly interpret it.

My confidence level is 95% with and alpha value of 5%.

Homework Answers

Answer #1

The p-values are conflicting because the Welch test is a parametric test and Mann-Whitney is a non-parametric test.

If the Lead_Measured variable is normally distributed then make the interpretation based on the Welch test, otherwise use the p-value of the Mann-Whitney test because the Welch test requires the assumption that the variable is normally distributed.

If the p-value is greater than 0.05 that means there is not a significant difference and when it is less than 0.05 that means there is a significant difference in the given problem.

If you have more questions you can send them to us and we will try our best to help you out.

Good luck with your studies!!!

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
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...
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...
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...
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...
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...
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...
Multiple Choice Questions Q1. In a hypothesis test, Beta is best described by P (Type I...
Multiple Choice Questions Q1. In a hypothesis test, Beta is best described by P (Type I error) P (Test Stat>|Observed Stat|) Power P (Type II error) Q2. Which alternative hypothesis would I need to double the p-value in a test for the mean? No feasible answer Lower tailed alternative Two sided alternative Upper tailed alternative Suppose our p-value is .184. What will our conclusion be at alpha levels of .10, .05, and .01? We will reject Ho at alpha=.10 or...
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...
1. For the following experiment/question, pick the most appropriate statistical test. You have the following statistical...
1. 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...
2. For the following experiment/question, pick the most appropriate statistical test. You have the following statistical...
2. 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...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT