For a sample of n = 30 scores, a score that is 6 points above the mean has a z-score of z = 1.50 . What is the sample standard deviation?
a. 4 c. 8
b. 6 d. 12
A
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We want to demonstrate that a relationship exists between optimism and happiness. We are not concerned with trying to demonstrate that one variable causes the other. What type of statistical test can be use to see if a relationship exists between the variables?
a. correlation b. independent samples t-test c. power analysis d. one way ANOVA
Stimuli that fall below the threshold of conscious awareness are called ________ stimuli.
Fill in the blank(s) with the appropriate word(s)
The _______ theory of aging suggests that unstable oxygen molecules cause damage to the structure of cells, increasing with age
a) wear-and-tear b) cellular clock c) disengagement d) free radical
The natural unfolding of skills and development that has more to do with genetics than environment is referred to as _____
a) the nature vs. nurture controversy. b) maturation. c) attachment. d) perceptual development.