Which of the following is not a requirement for using the chi-square statistic?
a. At least nominal level data
b. Random sampling should be employed
c. A comparison of only one group is necessary
d. Independent samples
c. A comparison of only one group is necessary.
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Since the 1850s, some foreigners came to the United States to stay, but many came as __________, intending to return home after earning enough money
Fill in the blank with correct word
In 2009, about __________ percent of families maintained by women with children were poor
(a) 39 (b) 47 (c) 57 (d) 67
Under this system, "the man's economic role became, in one sense, more important to the family, for he was the link between the family and the wider market economy.". This system is
a. the extended family. b. the dual income family. c. the breadwinner system. d. traditional households.
Which of the following statements is true about photosynthesis?
A. It helps maintain the carbon monoxide balance in the atmosphere. B. It is essential in the production of oxygen. C. It is of fundamental importance in producing the inorganic materials needed for supporting life. D. It is rarely affected by the spread of human population.