Question

1. What does an r value of zero mean? Solution 2. When n = 2 and...

1.

What does an r value of zero mean?

Solution

2.

When n = 2 and r = 1, are the data significant? Explain.

Solution

.

3.

When n = 100 and r = –0.89, is there a significant correlation? Explain.

Solution

4.

When testing the significance of the correlation coefficient, what is the null hypothesis?

Solution

5.

When testing the significance of the correlation coefficient, what is the alternative hypothesis?

Solution

Homework Answers

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
(a) Suppose n = 6 and the sample correlation coefficient is r = 0.894. Is r...
(a) Suppose n = 6 and the sample correlation coefficient is r = 0.894. Is r significant at the 1% level of significance (based on a two-tailed test)? (Round your answers to three decimal places.) t = critical t = Conclusion: Yes, the correlation coefficient ρ is significantly different from 0 at the 0.01 level of significance. No, the correlation coefficient ρ is not significantly different from 0 at the 0.01 level of significance.     (b) Suppose n = 10 and...
What does correlation coefficient : r and coefficient of determination: r^2 mean?
What does correlation coefficient : r and coefficient of determination: r^2 mean?
suppose we are given the following information: sample size (n) = 100 standard error of the...
suppose we are given the following information: sample size (n) = 100 standard error of the slope of the regression line (SEb1) = 2 y=100 + 4x a.) What is the test statistic to test the null hypothesis that the slope is zero versus the alternative hypothesis that the slope is not zero? b.) what is the P-value for a test of the null hypothesis that the slope is zero versus the alternative hypothesis that the slope is not zero?...
When testing a null hypothesis that the population correlation is 0, do you use a 1...
When testing a null hypothesis that the population correlation is 0, do you use a 1 or 2 tailed critical value if the sample r is -0.19. Update - Determining if there is a statistically significant correlation between parental behaviour and self-esteem          N= 713       r = -0.19 X variable – parental control Y variable – student’s self esteem T statistic for testing Ho: ρ = 0 T= r √n-2 / √1-r2 = -0.19 √711 / √1-(-0.19) 2 = -...
16. a. When testing the significance of the regression coefficient, what is the null hypothesis? b....
16. a. When testing the significance of the regression coefficient, what is the null hypothesis? b. When testing the significance of the regression coefficient, what is the alternative hypothesis?
The correlation coefficient r is a sample statistic. What does it tell us about the value...
The correlation coefficient r is a sample statistic. What does it tell us about the value of the population correlation coefficient ρ (Greek letter rho)? You do not know how to build the formal structure of hypothesis tests of ρ yet. However, there is a quick way to determine if the sample evidence based on ρ is strong enough to conclude that there is some population correlation between the variables. In other words, we can use the value of r...
The correlation coefficient r is a sample statistic. What does it tell us about the value...
The correlation coefficient r is a sample statistic. What does it tell us about the value of the population correlation coefficient ρ (Greek letter rho)? You do not know how to build the formal structure of hypothesis tests of ρ yet. However, there is a quick way to determine if the sample evidence based on ρ is strong enough to conclude that there is some population correlation between the variables. In other words, we can use the value of r...
Q1. Suppose we wish to test the null hypothesis that a coefficient is equal to zero...
Q1. Suppose we wish to test the null hypothesis that a coefficient is equal to zero vs. the alternative that it is not zero at the 5 % level. If the 95% confidence interval for the coefficient does not contain zero, then we will reject the null hypothesis. Explain. Q2. Suppose we perform an F test and reject the null hypothesis and all the coefficients except the constant are zero. Does this imply the regression is a good fit for...
compute r,r2 and 1-r2 for the problem below .What does r,r2 and 1-r2 mean ? Is...
compute r,r2 and 1-r2 for the problem below .What does r,r2 and 1-r2 mean ? Is the correlation strong or weak ? You are given the following data:                                X(Independent Variable)                             Y(Dependent variable) Month   Advertising Expenditure (in Millions of $)   Sales Revenue (in Millions of $)       July                       1                                                                         3 August                2                                                                         7 September          3                                                                         5 October               4                                                                         11 November           5                                                                         14
Test for a negative correlation using the sample correlation r=-0.39 and the sample size n=18. State...
Test for a negative correlation using the sample correlation r=-0.39 and the sample size n=18. State the null and alternative hypotheses.       Find the test statistic. Round your answer to two decimal places. t= Find the p-value. Round your answer to three decimal places. The p-value is  . What is the conclusion, using a 5% significance level?                                                                      ...