Question

A researcher wants to study the relationship between police expenditures in certain region and crime rate. The researcher collected a sample of 22 observations and found that the correlation coefficient r = -0.72. At the 0.05 significance level, can we conclude that the population correlation is different from zero?

1 - The value of t-calculated is:

2 - The decision rule is:

3 - The decision in this case is:

4 - The value of t-critical is:

5 - The null and the alternate hypotheses are:

Answer 1