Claim: ud < 0

a=.01

sample stats:

d bar = 1.2

sd= 3.2

n=18

a)

Ho:

Ha:

b) test stat is

t=

c) critical values are:

t0=

d)

since the test stat is (in or not in) the rejection region (reject or fail to reject) null hypothesis. There (is or is not) statistidally enough evident to supoort claim?