Morning Testing M= 19 Afternoon Testing M= 12 Older Adults Younger Adults M=19 M= 12 12. Does there appear to be a main effect of time of day? 13. Does there appear to be a main effect of age? 14. Does there appear to be an interaction between age and time of day? (Hint: Draw a line graph)

Morning Testing M= 19 Afternoon Testing M= 12 Older Adults Younger Adults M=19 M= 12 12. Does there appear to be a main effect of time of day? 13. Does there appear to be a main effect of age? 14. Does there appear to be an interaction between age and time of day? (Hint: Draw a line graph)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Example#1: A researcher wishes to examine whether time of day (morning versus afternoon) affects the memory of older and younger participants. He obtains a sample of 40 older individuals and 40 younger individuals and gives them a passage to read. They are later given a test over the passage (scores on the test could range from O to 30). HaJf of the individuals are randomly assigned to read the passage and take the test in the morning, and the other half do so in the afternoon. The data are reported in the table below (the numbers represent mean test scores for each group; that is, "M" is mean). Morning Testing M= 15 Afternoon Testing Older Adults M=8 Younger Adults М- 16 М-20