QUESTION 31

For each of the following values, is it always positive, always negative, or could be positive or negative?

a) F statistic [ Select ] ["always positive", "always negative", "could be positive or negative"]

b) Adjusted R² [ Select ] ["always positive", "always negative", "could be positive or negative"]

c) z statistic [ Select ] ["always positive", "always negative", "could be positive or negative"]

d) sample mean [ Select ] ["always positive", "always negative", "could be positive or negative"]

e) t critical [ Select ] ["always positive", "always negative", "could be positive or negative"]

f) p-value [ Select ] ["always positive", "always negative", "could be positive or negative"]

g) sample standard deviation [ Select ] ["always positive", "always negative", "could be positive or negative"]

h) slope from linear regression [ Select ] ["always positive", "always negative", "could be positive or negative"]