Question

g) It may be that the number of expletives is more related to the student's overall evaluation of the professor. Given that the correlation coefficient () of the relationship r of expletives and professor evaluation -.60 and the correlation coefficient (r)of the relationship between quiz score and professor evaluation +80 Determine the NATURE of the relationship between Statistics quiz score and number o expletives directed towards the Professor, controlling for the student's overall evalu of the professor. (do the statistic!) ation 2a). What is the NATURE of the relationship between SAT and GRE scores. Convert the raw data into ordinal data and do the proper statistic. SAT 400 450 440 500 500 610 500 800 900 STUDENT GRE 310 330 350 350 520 610 610 870 990

Answer 1

The given data is:

GRE	SAT
310	400
330	450
350	440
350	500
520	500
610	610
610	500
870	800
990	900

Converting into ordinal data, i.e. ranking as per values of the GRE and SAT scores, we get:

GRE	SAT
1	1
2	2
3	3
3	4
4	4
5	5
5	6
6	7
7	8

Correlation of the above GRE and SAT score ranks = CORREL(GRE, SAT) = 0.983

Hence, the high correlation suggests that GRE and SAT scores are highly correlated.