A researcher believes there is a negative correlation between age and amount of donation to a...
A researcher believes there is a negative correlation between age and amount of donation to a particular political candidate. Data is collected on 20 adults. If r = -0.73, at the 0.05 level is the researcher correct?
a. With a critical value of -1.734, ρ < 0.
b. With a critical value of -1.729, ρ = 0.
c. With a critical value of -1.725, ρ > 0.
d. With a critical value of -0.959, ρ < 0.
Homework Answers
Solution:
The correct option is:
a. With a critical value of -1.734, ρ < 0.
Explanation:
The left-tailed critical value at the 0.05 significance level
for degrees of freedom 
is:
The alternative hypothesis for the given test is:
Therefore, the option a is correct
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