Question

1. Research studies want to examine if there is an association between the amount of hair...

1. Research studies want to examine if there is an association between the amount of hair grease (mls) in the hair and the length of the hair (inches). You have a random sample of 75 participants. You select an alpha of 0.05 and a power of .80. Your p value is 0.034 and your r = .2. Your p-value is 0.034 and r = .2, what should you decide to do?

A. Reject the null and conclude that there is a weak correlation

B. Reject the null and state that it is a positive correlation

C. This information does not say anything

D. Fail to reject the null and state that it is a negative correlation

Homework Answers

Answer #1

TOPIC:Test for correlation and the strength of association.

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
Research studies want to examine if there is an association between the amount of hair grease...
Research studies want to examine if there is an association between the amount of hair grease (mls) in the hair and the length of the hair (inches). You have a random sample of 75 participants. You select an alpha of 0.05 and a power of .80. Your p value is 0.034 and your r = .2. From this scenario, what test should be conducted? A. Chi-square B. Anova test C. Pearson's correlation coefficient D. Dependent T-test
Association Between Hair and Eye Color: The following table shows the relationship between hair color and...
Association Between Hair and Eye Color: The following table shows the relationship between hair color and eye color for 6800 German men (adapted from O. Ammon (1899) as reported by Goodman and Kruskal (1954) Journal of the American Statistical Association, 49, 732-764.) Hair Color Eye color Brown Black Fair Red Brown 438 288 115 16 Grey or Green 1387 746 946 53 Blue 807 189 1768 47 Using hand calculations, use a chi-square test to test the null hypothesis that...
Association Between Hair and Eye Color: The following table shows the relationship between hair color and...
Association Between Hair and Eye Color: The following table shows the relationship between hair color and eye color for 6800 German men (adapted from O. Ammon (1899) as reported by Goodman and Kruskal (1954) Journal of the American Statistical Association, 49, 732-764.) Hair Color Eye color Brown Black Fair Red Brown 438 288 115 16 Grey or Green 1387 746 946 53 Blue 807 189 1768 47 Use a chi-square test to test the null hypothesis that hair color and...
A shopping centre wants to examine the amount of space required for parking. Studies indicated that...
A shopping centre wants to examine the amount of space required for parking. Studies indicated that 62% of staff and shoppers use public transportation. A survey of 1,002 was taken, and 567 responded that they used public transportation. a. State the null hypothesis and the alternate hypothesis. Round the final answers to 2 decimal places. H0: p =            H1: p ≠             b. State the decision rule for 0.10 significance level. (Negative answer should be indicated by...
A shopping centre wants to examine the amount of space required for parking. Studies indicated that...
A shopping centre wants to examine the amount of space required for parking. Studies indicated that 60% of staff and shoppers use public transportation. A survey of 1,002 was taken, and 555 responded that they used public transportation. a. State the null hypothesis and the alternate hypothesis. Round the final answers to 2 decimal places. H0: p =            H1: p ≠             b. State the decision rule for 0.05 significance level. (Negative answer should be indicated by...
Please choose between a,b,c or d for each question. Please be legible. 1. If we examine...
Please choose between a,b,c or d for each question. Please be legible. 1. If we examine an SPSS output where the two-tailed significance level is .018: a) We would fail to reject the null hypothesis with an alpha of .01 b) We would reject the null hypothesis with an alpha of .05 c) The p-value is .018 d) All of the above 2. The research and null hypotheses are always stated using Greek notation because the symbols of Greek notation...
Do taller adults make more money? The authors of a paper investigated the association between height...
Do taller adults make more money? The authors of a paper investigated the association between height and earnings. They used the simple linear regression model to describe the relationship between x = height (in inches) and y = weekly gross earnings in dollars in a random sample of men. The paper reported that the slope of the estimated regression line was b = 0.022 and the standard deviation of b was sb = 0.005. Carry out a hypothesis test using...
Use the following information to answer questions 8-12: Various studies indicate that approximately 9% of the...
Use the following information to answer questions 8-12: Various studies indicate that approximately 9% of the world's population is left handed. You think this number is actually higher. You take an SRS of 222 people and find that 23 of them are left handed. Test your claim at the 5% significance level. 8) State your null and alternative hypotheses. a. H0: p = 0.09; Ha: p < 0.09 b. H0: p = 0.09; Ha: p > 0.09 c. H0: p...
Activity 2: Hypothesis test from start to finish Is there evidence of a negative correlation between...
Activity 2: Hypothesis test from start to finish Is there evidence of a negative correlation between systolic blood pressure and heart rate? In a sample of 200 patients, we found a sample correlation of -0.057. State the hypotheses of interest. H0: rho=0    rho<0 What is the notation and value of the sample statistic? r Use StatKey to generate a randomization distribution for these hypotheses. Use the data set ‘ICU Admissions’ available on StatKey. What is the p-value? 0.211 Which two...
The following problem is based on information taken from Academe, Bulletin of the American Association of...
The following problem is based on information taken from Academe, Bulletin of the American Association of University Professors. Let x represent the average annual salary of college and university professors (in thousands of dollars) in the United States. For all colleges and universities in the United States, the population variance of x is approximately σ2 = 47.1. However, a random sample of 19 colleges and universities in Kansas showed that x has a sample variance s2 = 82.6. Use a...