4. (10pt) Assume you've collected data on 6 students that will tell you how many hours...

 

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4. (10pt) Assume you've collected data on 6 students that will tell you how many hours they work per week and their grade point averages (GPAS). The information is shown below: Case X Y 3.80 Zx -0.66 Zy 0.76 Zx * Zy 1. 10 3.44 0.14 2 3. 20 40 2.50 1.32 -1.48 4 35 2.81 0,99 -0.95 4.00 -1.32 1.10 6. 15 3.62 -0.33 0.45 a) Determine Zx * Zy b) Calculate the correlation coefficient. c) What does this correlation coefficient indicate about the relati onship? d) Set up the null hypothesis, test at 0.05 level of significance and state your condusion. 4. (10pt) Assume you've collected data on 6 students that will tell you how many hours they work per week and their grade point averages (GPAS). The information is shown below: Case X Y 3.80 Zx -0.66 Zy 0.76 Zx * Zy 1. 10 3.44 0.14 2 3. 20 40 2.50 1.32 -1.48 4 35 2.81 0,99 -0.95 4.00 -1.32 1.10 6. 15 3.62 -0.33 0.45 a) Determine Zx * Zy b) Calculate the correlation coefficient. c) What does this correlation coefficient indicate about the relati onship? d) Set up the null hypothesis, test at 0.05 level of significance and state your condusion.

Answer rating: 100% (QA)

Mean of X 20 Standard deviation of X 1517 Mean of Y 336 Standard dev... View the full answer