9 résultats pour "statistics"
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Statistics
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INTRODUCTION
Statistics, branch of mathematics that deals with the collection, organization, and analysis of numerical data and with such problems as experiment design and decision
making.
frequency, column (d), is the ratio of the frequency of an interval to the total count; the relative frequency is multiplied by 100 to obtain the percent relative frequency.The cumulative frequency, column (e), represents the number of students receiving grades equal to or less than the range in each succeeding interval; thus, thenumber of students with grades of 30 or less is obtained by adding the frequencies in column (c) for the first three intervals, which total 53. The cumulative relativef...
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Statistics
I
INTRODUCTION
Statistics, branch of mathematics that deals with the collection, organization, and analysis of numerical data and with such problems as experiment design and decision
making.
Professional pollsters typically conduct their surveys among sample populations of 1,000 people. Statistical measurementsshow that reductions in the margin of error flatten out considerably after the sample size reaches 1,000.© Microsoft Corporation. All Rights Reserved. The raw materials of statistics are sets of numbers obtained from enumerations or measurements. In collecting statistical data, adequate precautions must be taken tosecure complete and accurate information. The first problem of...
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Statistics Assignment
Workers For 110×130/200=71.5 110×50/200=27.5 110×20/200=11 110 Against 90×130/200=58.5 90×50/200=22.5 90×20/200=9 90 Total 130 50 20 200 Compare the exp ected frequencies to the observed frequencies in the data, we can calculate the observed chi-square statistic: 2.26 The chi-square statistic has degrees of freedom (2-1) x (3-1) = 2 . With a 5% significance level, the rejection region is (( 5.99, + ∞ ) . 2.26 is not in the rejection region, so we cannot reject the null hypothesis. Th...
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Census.
Prior to any census, a census agency must develop an accurate list of addresses and maps to ensure that everyone is counted. The U.S. Census Bureau obtainsaddresses primarily from the United States Postal Service and from previous census address lists. It also works closely with state, local, and tribal governments tocompile accurate lists. Finally, census agencies often conduct an extensive marketing campaign before Census Day to remind the general population about theimportance of responding t...
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National Basketball Association Records.
Elmore Smith 1973-74 4.85 Mark Eaton 1985-86 4.61 Hakeem Olajuwon 1989-90 4.59 Dikembe Mutombo 1995-96 4.49 David Robinson 1991-92 4.49 Hakeem Olajuwon 1991-92 4.34 Manute Bol 1988-89 4.31 Tree Rollins 1982-83 4.29 1. Introduced in the 1979-80 season.2. Did not become an official statistic until 1973-74 season. Source: National Basketball Association.. NBA Records - Career.Player Total Points Kareem Abdul-Jabbar 38,387 Karl Malone 36,928 Michael Jordan 32,292 Wilt Chamberlain 31,419 Moses Mal...
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National Basketball Association Records.
Elmore Smith 1973-74 4.85 Mark Eaton 1985-86 4.61 Hakeem Olajuwon 1989-90 4.59 Dikembe Mutombo 1995-96 4.49 David Robinson 1991-92 4.49 Hakeem Olajuwon 1991-92 4.34 Manute Bol 1988-89 4.31 Tree Rollins 1982-83 4.29 1. Introduced in the 1979-80 season.2. Did not become an official statistic until 1973-74 season. Source: National Basketball Association.. NBA Records - CareerPlayer Total Points Kareem Abdul-Jabbar 38,387 Karl Malone 36,928 Michael Jordan 32,292 Wilt Chamberlain 31,419 Moses Malo...
- la société de l’information
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Unemployment.
set up to monitor the economy and provide advice to the president and Congress. Between 1945 and 1990 nine cyclical swings in unemployment occurred; all weresmaller than the 1930s depression. During this period the unemployment rate was as low as 2.9 percent (1953) and as high as 9.7 percent (1982). Because of cutbacksin the unemployment insurance program and changes in the nature of employment during the 1980s, however, only 37 percent of jobless workers received benefits in1990. Fears that the...
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Guatemala - country.
C Climate The climate of Guatemala varies according to elevation, from hot coastal plains to cold mountain heights. Most of the population lives between 900 and 2,400 m (3,000and 8,000 ft) above sea level, where there are warm days and cool nights with average annual temperatures of 20°C (68°F). The coastal regions are hot and humid,with average annual temperatures of 28°C (83°F). A rainy season, from May through October, is sometimes called “winter” because it brings cloudy afternoons andlower...