Question

Given the following information, use Table B.4 in Appendix B to determine whether the correlations are...

Given the following information, use Table B.4 in Appendix B to determine whether the correlations are significant and how you would interpret the results.

1. The correlation between speed and strength for 20 women is .567. Test these results at the .01 level using a one-tailed test.

2. The correlation between the number correct on a math test and the time it takes to complete the test is -.45. Test whether this correlation is significant for 80 children at the .05 level of significance. Choose either a one- or two-tailed test and justify your choice.

3. The correlation between the number of friends and grade point average (GPA) for 50 adolescents is .37. Is this significant at the .05 level for a two-tailed test?

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

Homework Answers

Answer #1

thank you

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
In a survey of youth in southern Minnesota, the following correlations and p value results were...
In a survey of youth in southern Minnesota, the following correlations and p value results were found when the students were asked why they were changing schools: n = 175 (df = 173). α = .05. Assume the study is two-tailed, only interested in whether a relationship exists. Measures of Correlation for the Desire to Change Schools Correlation (r ) with Significance Number of fights in the last year .567, p < .05 Number of students arrested in the last...
Find the critical value of t from Appendix D for the following situations. Specify the correct...
Find the critical value of t from Appendix D for the following situations. Specify the correct degrees of freedom, whether the value is “+/-“ or is “+ or –“ and, if the actual df value isn’t the table, specify which you used. a) N = 31, α = .05, one-tailed one sample t-test    _______________________________ b) N = 25, α = .01, two-tailed one sample t-test   _______________________________ c) N = 26, α = .05, one-tailed one sample t-test    _______________________________ d) N...
The following matrix displays the bivariate correlations between family size (X), weekly grocery bill (Y), and...
The following matrix displays the bivariate correlations between family size (X), weekly grocery bill (Y), and income (Z) for a random sample of 50 families.               X          Y          Z    X         1.00      .60       .20 Y          .60      1.00      .30 Z          .20       .30      1.00 First, list the values of the 3 unique correlations, identifying the two variables in each correlation in some way. Which of the correlations is statistically significant at the .05 level? Be sure to record the information on which you...
The following matrix displays the bivariate correlations between family size (X), weekly grocery bill (Y), and...
The following matrix displays the bivariate correlations between family size (X), weekly grocery bill (Y), and income (Z) for a random sample of 50 families.              X          Y          Z    X         1.00      .60       .20 Y          .60      1.00      .30 Z          .20       .30      1.00 First, list the values of the 3 unique correlations, identifying the two variables in each correlation in some way. (rxy = ?; rxz = ? ryz = ?) Which of the correlations is statistically significant at the .05 level?...
You want to determine whether or not there is a significant relationship between IQ and eye-hand...
You want to determine whether or not there is a significant relationship between IQ and eye-hand coordination. You obtain scores for the 62 students in a university class on both an IQ test and an eye-hand coordination test. (a) State the null hypothesis. (b) Given the number of students in your study, what is the tabled value of r for significance at the .05 error (95% confidence) level? Use a two-tailed test. (c) Assume that you calculate a Pearson r...
36. A researcher wants to examine if there is a correlation between number of work hours...
36. A researcher wants to examine if there is a correlation between number of work hours per week and academic performance in a sample of n = 150 undergraduate students. What will be the null hypothesis, if she plans to use a two-tailed Person’s correlation test in data analysis? A. There is a significant correlation between number of work hours per week and academic performance in the population of undergraduate students. B. There is a significant positive correlation between number...
A researcher would like to know whether there is a consistent, predictable relationship between verbal skills...
A researcher would like to know whether there is a consistent, predictable relationship between verbal skills and math skills for high school students. A sample of 200 students is obtained and each student is given a standardized English test and a standardized math test. Based on the test results, students are classified as high or low for verbal skills and for math skills. The results are summarized in the following frequency distribution: Verbal Skills High Low High Math 50 30...
The following 4 questions refer to Scenario 4. Generally speaking, people are pretty bad at telling...
The following 4 questions refer to Scenario 4. Generally speaking, people are pretty bad at telling whether or not someone is lying. Researchers are interested in studying if age is associated with ability to tell if someone is lying. Researchers compare a group of children (ages 8-10), adolescents (ages 14-17), and adults (ages 25-45) on their ability to tell if a person in a recorded video is lying or telling the truth. A. What is the null hypothesis for scenario...
Patients recovering from an appendix operation normally spend an average of 6.3 days in the hospital....
Patients recovering from an appendix operation normally spend an average of 6.3 days in the hospital. The distribution of recovery times is normal with a σ = 2.2 days. The hospital is trying a new recovery program designed to lessen the time patients spend in the hospital. The first 25 appendix patients in this new program were released from the hospital in an average of 5.5 days. On the basis of these data, can the hospital conclude that the new...
A researcher is trying to determine whether there is a difference in the number of new...
A researcher is trying to determine whether there is a difference in the number of new friends that students make during their freshman year based on whether they live on or off campus. The descriptive statistics for the two groups are presented below. Conduct the appropriate hypothesis test to determine whether there is a significant difference in the number of new friends made. On-Campus Freshmen Off-Campus Freshmen X1 = 4.48 s1 =1.81 N1 =16 X2 =3.61 s2 =1.86 N2 =16...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT