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Seven students take a speed reading course in order to improve their reading ability. The reading scores of the seven before and after taking the
Seven students take a speed reading course in order to improve their reading ability. The reading scores of the seven before and after taking the course are given below:
person 1 2 3 4 5 6 7
x Test Score (before) 350 371 360 400 450 389 410
y Test Score (after) 370 366 365 413 440 420 419
Note thatn= 7. We will defined1= x1- y1. After doing the appropriate calculations, we find that .
d- =-9 Sd = 14.12
Find the 80 % confidence interval for mean of the differences,d.
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