An independentmeasures research study uses two samples each

An independent-measures research study uses two samples, each with n = 10, to compare two treatments. If the results are evaluated with a t statistic using a two-tailed test with a = .05, then the critical region would have boundaries of ____.

t = ±2.101

t = ±2.262

t = ±2.086

t = ±2.093

The results of an independent-measures research study are reported as \"t(5) = -2.12, p > .05, two tails.\" What statistical decision was made?

The researcher failed to reject H0.

There was a marginally significant effect.

Cannot be determined from the researcher\'s statement

The null hypothesis was rejected.

Which of the following research situations is most likely to use an independent-measures design?

Evaluate the effectiveness of a pain reliever by measuring how much pain is reduced after taking the medication.

Evaluate the development of verbal skills between age 2 and age 3 for a sample of girls.

Evaluate the effectiveness of a cholesterol medication by comparing cholesterol levels before and after the medication.

Evaluate the difference in self-esteem between student athletes and non-athletes.

Solution

An independent-measures research study uses two samples, each with n = 10, to compare two treatments. If the results are evaluated with a t statistic using a two-tailed test with a = .05, then the critical region would have boundaries of t(0.05,n-1)=t(0.05,9)=+/-2.262

The results of an independent-measures research study are reported as \"t(5) = -2.12, p > .05, two tails. Thus, the statistical decision is The researcher failed to reject H0 as p value is greater than 0.05.

Evaluate the development of verbal skills between age 2 and age 3 for a sample of girls- independent-measures design.

Evaluate the difference in self-esteem between student athletes and non-athletes.- independent-measures design.