The basic chemical properties of an element are established by the:
a. atomic mass
b. atomic number
c. type of protons in the nucleus
d. diameter of the nucleus
b
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Complete the following chart (round off relative humidity to the nearest percent).
As the Baby Boom ages and the elderly cohorts get larger, the dependency ratio in the United States will
A) drop. B) rise. C) disappear. D) stay the same. E) fluctuate more and more.
Poland has a long-standing history of working to oppose the Communist domination of its country.
a. true b. false
We calculate BSS = 10 * (540.3 - 543.6)2 + 16 * (602.9 - 543.6)2 + 17 * (489.8 - 543.6)2 = 105578.2 WSS = (10 - 1) * 46.42 + (16 - 1) * 47.42 + (17 - 1) * 48.92 = 91337.4 F = (BSS / (k-1)) / (WSS / (n-k)) = (105578.2 / (3 - 1)) / (91337.4 / (43 - 3)) = 23.1 The critical F value is F.05,2,40 = 3.23. The observed value vastly exceeds this, so we clearly reject the null hypothesis and conclude that the means differ across the groups.
