Question

# : Identify IV, DV, and hypotheses and evaluate the null hypothesis for an independent samples t...

: Identify IV, DV, and hypotheses and evaluate the null hypothesis for an independent samples t test.

Data: Use the information from Problem Set 3.7.

Instructions: Complete the following:

Minutes of practice:

Group 1: 34, 25, 4, 64, 14, 49, 54

Group 2: 24, 78, 59, 68, 84, 79, 57

a.   Identify the IV and DV in the study.

b.   State the null hypothesis and the directional (one-tailed) alternative hypothesis.

c.   Can you reject the null hypothesis at α = .05? Explain why or why not.

a.   Identify the IV and DV in the study.

IV = Minutes of practice

b.   State the null hypothesis and the directional (one-tailed) alternative hypothesis.

The hypothesis being tested is:

H0: µ1 = µ2

H1: µ1 < µ2

c.   Can you reject the null hypothesis at α = .05? Explain why or why not.

 Group 1 Group 2 34.86 64.14 mean 21.99 20.46 std. dev. 7 7 n 12 df -29.286 difference (Group 1 - Group 2) 450.976 pooled variance 21.236 pooled std. dev. 11.351 standard error of difference 0 hypothesized difference -2.580 t .0120 p-value (one-tailed, lower)

The p-value is 0.0120.

Since the p-value (0.0120) is less than the significance level (0.05), we can reject the null hypothesis.

Therefore, we can conclude that µ1 < µ2.

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