Statistics show that since 1970, the gap between the rich and the poor in terms of the division of a nation's income
a. has increased.
b. has decreased.
c. has stayed the same.
d. doesn't exist.
A
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Costa and McCrae suggest that personality traits stop changing by age 30, after which they appear to be "set in plaster." Which of the following gives validity to their claim?
a. Their studies were cross-sectional. b. Their correlations were high. c. Many additional research studies have been conducted that support their claim. d. Laypeople's observations of the personality traits of others supports their claim.
Millennials value parenthood more than marriage
Indicate whether the statement is true or false
What is creativity, and how does it change across the life span?
What will be an ideal response?
When testing for the significance of the difference between two sample means, we must first estimate ___________ before we can compute the test statistic
a. the standard deviation of the sampling distribution b. the standard deviations of the samples c. the population means d. the critical region