1980 census of population: Ancestry of the population by by United States. Bureau of the Census. Population Division

By United States. Bureau of the Census. Population Division

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Additional info for 1980 census of population: Ancestry of the population by state: 1980. supplementary report National Census and Statistics Office, National Economic and Development Authority, Republic of the Philippines, Special Report (Том 1)

Example text

Of the 792 possible random divisions, only 2 give this most extreme result (2 because either of the two 8-day mice might be in E). 0025. 1. Again only 2 of the possible randomizations put 4, 10, 7, 1, 8 into E, but, on any reasonable criterion, many others are equally or more extreme. For example 3, 10,8, 1,8 and 4, 10,3, 1, 12 are equivalent in giving a mean of 6 (or a total of 30); others such as 3, 10,4, 1,9 and 3, 4, 7, 14, 1 give smaller totals and means. We might search the 792 possibilities to find every selection of 5 out of 12 that gives a total of 30 or less.

Bn. Uyou are not familiar with this, write it out in full for n = 2 and n = 3, to give results that you ought to recognize. Thus (a + bt is expressed (a Significance, Binomials, and X2 / 47 as the sum of all terms of the form (~)an - r br, starting from r = 0 and continuing to r = n. ). 5, you are asked about the probability of some compound event, and you are invited to consider obtaining this by use of the binomial distribution. Assume that P is a known numerical value; if it makes the questions easier for you, use the values suggested in round brackets.

Similarly, if 2 mice are chosen simultaneously, the 10 possibilities are W 1 W 2 , W 1 W 3 , W 1 B 1 , W 1 B 1 , W 2 W 3 , W 2 B 1 , W 2 B2 , W3 B l' W3 B 2' B1B2 and all are equally likely. Therefore Pr(2 white) = 3/10, Pr(l of each) = 6/10, Pr(2 brown) = 1/10. The concept of a limit of relative frequency is still relevant. Although we have only 5 mice, we can also talk about an infinite population of repeated trials of 'select 2 at random from the 5'; ifthis were tried, the relative frequency of 2 white would oscillate around 3/10 and approach this as a limit.

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