Question

A cognitive psychologist wants to investigate whether memory for a shopping list is affected by the strategy used to study the list. She selects 20 random students and assigns each of them randomly to one of four different groups. Each group is given a different strategy by which to study the list. After the students study the list, they try to recall as many items as they can. The number of items remembered from the list for each students is given below. Is there sufficient evidence to conclude that different strategies lead to different memory performance? Use significance level 0.05

Note that the numbers in this problem have been manufactured such that all of the group means and the grand mean are whole numbers.

Memory for Shopping List

Strategy A	Strategy B	Strategy C	Strategy D
25	25	23	24
26	24	25	19
27	25	19	22
27	25	22	23
20	26	26	27

Step 1 of 10 :  

Calculate the value of the Sum of Squares Treatment (SST)

(Answering all 10 parts would be extremely helpful)

Answer 1

E C 1 Anova: Single Factor 2 3 SUMMARY Average Variance Count Sum Groups 4 8.5 25 125 5 5 A 25 0.5 125 6 B 23 7.5 115 7 C 23 8.5 115 8 D 10 11 ANOVA F crit P-value F MS df SS 12 ource of Variation 3.238871517 3 6.666667 1.066667 0.390913 20 13 Between Groups 14 Within Groups 6.25 16 100 15 19 120 16 Total 17 18 19 20 21 22 23 555

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