In studying the relationship between age and time spent exercising, suppose you computed r=−0.307 using n=20 data points. Using the critical values table below, determine if the value of r is...

In studying the relationship between age and time spent exercising, suppose you computed r=−0.307 using n=20 data points. Using the critical values table below, determine if the value of r is significant or not.

df	CV (+ and -)	df	CV (+ and -)	df	CV (+ and -)	df	CV (+ and -)
1	0.997	11	0.555	21	0.413	40	0.304
2	0.950	12	0.532	22	0.404	50	0.273
3	0.878	13	0.514	23	0.396	60	0.250
4	0.811	14	0.497	24	0.388	70	0.232
5	0.754	15	0.482	25	0.381	80	0.217
6	0.707	16	0.468	26	0.374	90	0.205
7	0.666	17	0.456	27	0.367	100	0.195
8	0.632	18	0.444	28	0.361
9	0.602	19	0.433	29	0.355
10	0.576	20	0.423	30	0.349