Calculating correlation coefficient for sample data

Reference no: EM1317195

Q1) A random sample of two variables, x and y produced the following observations

X	Y
19	7
13	9
17	8
9	11
12	9
25	6
20	7
17	8

a) Develop scatter plot for two variables and explain what relationship, if any, exists.

b) Calculate correlation coefficient for these sample data.

c) Test to find out whether population correlation coefficient is negative. Use a significance level of 0.05 for hypothesis test.

Reference no: EM1317195

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