What do researchers mean when they describe a difference as statistically significant?
A. that the variance in one variable is significantly greater than the variance in other
B. that there is a 95% chance that one variable caused a change in another
C. that the effect size is large
D. that it is very unlikely that the observed difference resulted merely from chance
D. that it is very unlikely that the observed difference resulted merely from chance
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The women who joined the workforce to support the war effort __________.
a. were mostly young and single b. entered into traditional female fields, such as domestic and secretarial work c. were often ignored by industries with d. included middle-aged housewives
The National Origins Act of 1924 was aimed at limiting the immigration of __________
A) western Europeans and Irish Protestants B) western European Catholics and Japanese C) southern and eastern Europeans and Japanese D) Germans and southern and eastern Europeans
Immigrants did not participate in prize fighting
a. True b. False Indicate whether the statement is true or false
By 1520 the Inca empire was ________ Spain and Portugal combined.
A. about the same size as B. approximately half the size of C. more than three times as large as D. twice as large as