Determine true or false? a) If the median of X is greater than the mean of X than the distribution of X ispositively skewed. b) For Normal populations the median and the mean are approximately equal....

Determine true or false?

a) If the median of X is greater than the mean of X than the distribution of X ispositively skewed.

b) For Normal populations the median and the mean are approximately equal.

c) The median and the Inter-quartile range are measures of variability in apopulation.

d) The correlation between two positive quantities is always positive.

e) If the correlation between X and Y is negative than the slope of the regressionline for predicting Y from X is negative.

f) Pearsons correlation coefficient is always between -1 and +1. This is notnecessarily true for Spearmans correlation coefficient.

Extracted text: VI. In the following example the researcher was interested in how the application of a fertilizer affected the height of sunflower plants. The fertilizer was applied to one test plot and the height of n= 20 sunflower plants in that test plot were measured 201.6 235.6 212.7 222.1 220.9 225.4 205.5 219.2 220.3 216.8 239.5 206.2 213.3 207.2 198.4 224.2 248.0 226.4 231.9 211.5 Er² = 965341.25 Σ 4386.7 In addition no fertilizer was applied to a second test plot and the height of m = 15 sunflower plants in that test plot were measured. 144.7 149.5 128.2 126.3 154.3 144.7 131.9 138.6 113.6 102.7 101.6 156.9 119.3 141.2 151.2 Ey = 2004.7 Ey² = 272453.21