Question

The data (ratings of perceived sleepiness based on a 0-15 scale, where low numbers indicated low levels of sleepiness and vice versa) for the experiment outlined in #4, above, appear below:

Condition 1: 1 7 3 2 4 2 6 5 4 5

Condition 2: 0 1 3 4 0 2 0 3 0 4

Calculate the appropriate test for these results (assume a = .05). Be sure to state the calculated and critical values of the statistic for this test. Would you reject or fail to reject the null hypothesis in this situation? Why? Show your work and include all formulas that you're using!

Answer 1

Given:

Condition 1:

= 3.9, n1 = 10, S1 = 1.9

Condition 2:

= 1.7, n2 = 10, S2 = 1.7

Use: Two sample t test Assuming Unequal Variance

Hypothesis:

Degrees of Freedom:

Test statistic:

Critical value:

           ….using t table

Conclusion:

Test statistic (t) > Critical value i.e 2.72 > 2.1009, Therefore Reject Ho at 5% level of sinificance.