A researcher ran a study to determine the relationship between how good a person thinks their memory is and how well they actually do on a memory task. They were asked to score their memory (where 1 = very poor and 10 = excellent). Their actual memory was tested by showing them a video of a minor traffic crash and asking them a series of ten questions.
Participant Score on Test Self-Rating
A 5 3
B 6 4
C 4 5
D 8 8
E 7 9
F 9 10
G 6 7
H 8 7
I 6 5
J 7 6
a) What is the Pearson correlation coefficient for the variables ‘Score on Test’ and ‘Self-Rating’?
b) Is the correlation significant at the 95% confidence level? Yes or No. Why?
c) Describe the strength of the correlation.
d) Is the ranked correlation coefficient for the variables ‘Score on Test’ and ‘Self-Rating’ different than what you found in a)? If yes, what is it? If no, explain why not.
This question belongs to Statistics and it is about a study of people’s memory of self rating and actual test. Pearson correlation coefficient has been used here to explain the score on test and self rating.
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