The following sample data, saved in the LM9_115 file, were collected on variables x and y:
x | 0 | 3 | 0 | -4 | 3 | 0 | 4 |
y | 0 | 2 | 2 | 0 | 3 | 1 | 2 |
a. Specify the null and alternative hypotheses that should be used in conducting a hypothesis test to determine whether the variables x and y are correlated.
b. Conduct the test of part a , using α =.05.
c. What is the approximate p -value of the test of part b ?
d. What assumptions are necessary to ensure the validity of the test of part b ?
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