A researcher found a Pearson correlation of r= 0.81 between measure X and measure Y. Which of the following is not a plasuble value of the reliability of measure X?   A. 0.71 B. 0.85 C. 0.90 D. 0.95 E. 0.82

1. Find the correlation coefficient  2. Find the p-value

What is the r2value if the obtained correlation is r= 0.70? a.  0.049 b.  0.49 c.  1.40 d.  Cannot tell without additional information

An r value of .8 indicates a strong positive correlation.  True  False

The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table. Do these data provide evidence to reject the null hypothesis that ? = 0 in favor of ? ≠ 0 at ? = .05? (Give your answers correct to three decimal places.) Population 10.4 2 3.4 6 6.2 1.2 2.7 3.1 0.8 5 Crime Rate 12.6 8.9 7.5 8.9 7.8 9.3 8 7.4 8.6 9.3 (a) Calculate r. _______(ii) Calculate the critical region._____ (smaller value) ______(larger value)(b) State the appropriate conclusion. Reject the null hypothesis, there is not significant evidence that ? ≠ 0.Reject the null hypothesis, there is significant evidence that ? ≠ 0.    Fail to reject the null hypothesis, there is not significant evidence that ? ≠ 0.Fail to reject the null hypothesis, there is significant evidence that ? ≠ 0.

Provide answer.

Respond to the following questions about Pearson’s correlation. Which is a stronger correlation, r = 0.48 or r = -0.56? Explain.

The standard deviation of a population   A. Is the average of the squared deviations between each of the data points and the mean   B. Is the average distance from each of the data points to the population's mean   C. Is impossible to calculate   D. Is only for statisticians   E. All of the above   F. None of the above

A Pearson's correlation produces a significant r = -0.32. We can infer that it is a _____ relationship.

The data below is how much money an ice cream store makes and what the max temperature was at that day. Test the claim that there is no correlation between the two. Use a significance of .05. Temp Dollars (Farenheit) made 81 4145 91 3342 98 4180 105 5121 84 2480 89 3011 94 3630 86 2777 95 3914 103 4798 91 4702 立