Answer:
Solution By Gauss jordan elimination method
x = 3, y = 2 and z = 4
The outlier (61) is at the low end of the data set, but doesn't affect the mean by a lot, so ...
The mean is centered among the other numbers in both sets of data.
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The mean without the outlier is 114. With the outlier, it is 107.4. The lower quartile is 108, so the mean does get moved outside the "box" of the box-and-whisker plot of the data set without the outlier.
Answer:
This study uses random sampling
This study uses a control group
This study uses a repeated measures design
the median of her 20 students is 82.5
The 3rd graph should be it
