Test the Claim That μD < 0 Using the Sample $\mathrm { n } = 18 , \overline { \mathrm { d } } = - 1.5 , \mathrm {~s} \mathrm {~d} = 0.2$

Essay

Test the claim that μd < 0 using the sample statistics below. Assume the samples are random and dependent,
and the populations are normally distributed. Use α = 0.10.
Sample statistics: $\mathrm { n } = 18 , \overline { \mathrm { d } } = - 1.5 , \mathrm {~s} \mathrm {~d} = 0.2$