the paired values of the consumer price index (cpi) and the cost of a slic of pizza are listed in the table. assume a 0.01 significance level. determine the correlation coefficient and find the critical values.
r = 0.985; critical values = ±0.917
r = 0.985; critical values = ±0.811
r = 0.872; critical values = ±0.811
r = 0.872; critical values = ±0.917