Reference no: EM132849236

For the following observations, perform a dependent sample t-test to answer the question if orientation of a puzzle (regular vs. mirrored) affects the response time (to spot all the differences). Please refer to the recording of the lecture if your require clarification of the question.

Participant

Xm Xr

A 19 12

B 24 25

C 37 31

D 62 58

E 80 73

Please:

- state: research design, IV, DV
- show your work for all four steps of hypotheses testing
- report Cohen's d
- report r2
- include 95% confidence interval
- report your answer in words that directly address the research question and report statistics including p-value)
- sketch graph for the findings (clearly name the axis)

PART II

Refer to the example discussed in class when people were asked to estimate IQ for themselves versus their classmates

a) What minimum mean difference would we need to get to get p<0.01?

b) How would you know if the result is significant or not just by looking at the Confidence Interval?

c) Why does the dependent t test give contradictory results to the independent t test on the same data?