In order to select a stratified random sample of 500 individuals from a population of 25000 individuals in which 15% are seniors, 19% are juniors, 20% are sophomores, and 46% are freshmen, _____ juniors should be included in the sample
a. 95 c. 190
b. 75 d. 7.50
A
19% of 500 is 95 individuals.
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Brandon's developmental psychology teacher believes human development is best conceptualized as progressing through several qualitatively different stages of thinking that change radically at specific ages. His instructor is likely a(n) a. Piagetian
b. social learning theorist. c. ecological theorist. d. behaviorist.
Explain how norms can be manipulated to change behavior such as littering
What will be an ideal response?
A researcher investigates whether there is a relationship between gender and color discrimination by randomly selecting 50 males and 50 females and asking them to discriminate between colors. The variable measuring accuracy in color discrimination is a
a. true independent variable. c. dependent variable. b. quasi-independent variable. d. nominal scale.
The symbol for the standard deviation is _____
a. SE c. s2 b. s d.