21. Two researchers conduct separate studies to test Ho=500 against Hop 500. The first researcher gets 519.5, with a standard error of 10.0. The second researcher gets =519.7. with a standard error of 10.0.

a) Using a .05, test in each case whether the result is "statistically significant "

b) Explain the dangers of reporting the result of a test as "P .05." or as "reject Ho" versus "Do not reject Ho"