MATH 225N WEEK 7 LAB ASSIGNMENT
BUNDLED SET 2026 COMPLETE ANSWER KEY
โ b) Describe the overall pattern of the distribution and any
departures from that pattern. Answer: Skewed right with gaps
between 3 & 4.4 and from 6.2 to 7.5. The spread is from 1.1 to 7.5.
There appears to be one outlier 7.5. The center is about 2.4.
โ The fraction of the variation in the values of y that is explained by
the least-squares regression of y on x is... Answer: the square of the
correlation coefficient
โ 5. In addition to the regression line, the report on the Mumbai
measurements says that r^2 = 0.95. This suggests that Answer: 95%
of the variation in height is accounted for by the regression line
โ Acid rain question
Identify the slope of the line and explain what it means in this
setting Answer: -0.0053. For each additional week in the study, the
predicted pH decreased by 0.0053 units.
โ Acid rain question
