d. Construct a 95% confidence interval for sentences - intentional Lower bound =

Question

d. Construct a 95% confidence interval for sentences - intentional

Lower bound =

Upper bound =

f. Finally, quantify the effect size for this test using Cohen's d, using the mean difference you computed previously and the pooled standard deviation:

Sp =

Cohen's d =

811 points I Previous Answers My Notes An experiment on memory was performe in which 16 subjects were randomly assigne o one of two roups, called "Sentences" or intentional ch subject was given a list of 50 words. Subjects in the "Se tences group were told to form multiple sentences, each using at least two words from the list, and to keep forming sentences until all the words were used at least once. Subjects in the "Intentional" group were told to spend five minutes memorizing as many of the 50 words as possible. Subjects from both groups were then asked to write down as many words from their lists as they could recall. We are interested in determining if there is a significant difference in the average number of words recalled for subjects in the "sentences group vs. subjects in the "intentional" group, using a 0.05. The data is in the table below. ber of words recalled 30 33 33 34 34 32 31 34 group For these questions, round all numeric al wers to three decimal places)

Explanation / Answer

for 95% CI, z-value = 1.96

lower bound = (35 - 32.625) - 1.96*0.84 = 0.7286

upper bound = (35 - 32.625) + 1.96*0.84 = 4.0214

Sentences Intentional Mean 32.625 35 Variance 2.267857143 3.428571429 Observations 8 8

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.