DeterminingSampleSizePPT學(xué)習(xí)教案

1、會(huì)計(jì)學(xué)1DeterminingSampleSize第1頁(yè)/共64頁(yè)Copyright 2000 by Harcourt, Inc. All rights reserved.第2頁(yè)/共64頁(yè)第3頁(yè)/共64頁(yè)第4頁(yè)/共64頁(yè)第5頁(yè)/共64頁(yè)Frequency Distribution of Deposits Frequency (number ofpeople making depositsAmount in each range)less than $3,000 499$3,000 - $4,999 530$5,000 - $9,999 562$10,000 - $14,999 718$15,0

2、00 or more 8113,120第6頁(yè)/共64頁(yè)Amount Percentless than $3,000 16$3,000 - $4,999 17$5,000 - $9,999 18$10,000 - $14,999 23$15,000 or more 26100Percentage Distribution of Amounts of Deposits第7頁(yè)/共64頁(yè)Amount Probabilityless than $3,000 .16$3,000 - $4,999 .17$5,000 - $9,999 .18$10,000 - $14,999 .23$15,000 or m

3、ore .261.00Probability Distribution of Amounts of Deposits第8頁(yè)/共64頁(yè)X第9頁(yè)/共64頁(yè)NXi Copyright 2000 by Harcourt, Inc. All rights reserved.第10頁(yè)/共64頁(yè)nXXiCopyright 2000 by Harcourt, Inc. All rights reserved.第11頁(yè)/共64頁(yè)Number of Sales Calls Per Day by SalespersonsNumber ofSalesperson Sales callsMike 4Patty 3Bil

4、lie 2Bob 5John 3Frank 3Chuck 1Samantha 526第12頁(yè)/共64頁(yè)Sales for Products A and B, Both Average 200Product AProduct B196150198160199176199181200192200200200201201202201213201224202240202261第13頁(yè)/共64頁(yè)第14頁(yè)/共64頁(yè)第15頁(yè)/共64頁(yè) 第16頁(yè)/共64頁(yè)xxdii第17頁(yè)/共64頁(yè)Low Dispersion Verses High Dispersion150 160 170 180 190 2002105

5、4321Low DispersionValue on VariableFrequency第18頁(yè)/共64頁(yè)150 160 170 180 190 20021054321FrequencyHigh dispersionValue on Variable第19頁(yè)/共64頁(yè)0)(nXXiCopyright 2000 by Harcourt, Inc. All rights reserved.第20頁(yè)/共64頁(yè)nXXi2)(Copyright 2000 by Harcourt, Inc. All rights reserved.第21頁(yè)/共64頁(yè)22SSamplePopulationCopyright

6、 2000 by Harcourt, Inc. All rights reserved.第22頁(yè)/共64頁(yè)1)22nXXSCopyright 2000 by Harcourt, Inc. All rights reserved.第23頁(yè)/共64頁(yè)第24頁(yè)/共64頁(yè)12nXXxiSCopyright 2000 by Harcourt, Inc. All rights reserved.第25頁(yè)/共64頁(yè)第26頁(yè)/共64頁(yè)Normal DistributionMEAN第27頁(yè)/共64頁(yè)2.14%13.59%34.13% 34.13%13.59%Normal Distribution2.14%第28

7、頁(yè)/共64頁(yè) 8511510014570第29頁(yè)/共64頁(yè)第30頁(yè)/共64頁(yè)fall within 3 standard deviations of the mean第31頁(yè)/共64頁(yè)A Standardized Normal Curve01-1-22z第32頁(yè)/共64頁(yè) z+z第33頁(yè)/共64頁(yè)xzCopyright 2000 by Harcourt, Inc. All rights reserved.第34頁(yè)/共64頁(yè)xz第35頁(yè)/共64頁(yè)-2 -1 0 1 2Sometimes thescale is stretchedSometimes thescale is shrunkXxzCop

8、yright 2000 by Harcourt, Inc. All rights reserved.第36頁(yè)/共64頁(yè)P(yáng)opulation DistributionSample DistributionSampling Distribution第37頁(yè)/共64頁(yè) Population Distributionx第38頁(yè)/共64頁(yè)Sample Distribution_CXS第39頁(yè)/共64頁(yè)Sampling DistributionXSXX第40頁(yè)/共64頁(yè)第41頁(yè)/共64頁(yè)Copyright 2000 by Harcourt, Inc. All rights reserved.第42頁(yè)/共6

9、4頁(yè)nSxCopyright 2000 by Harcourt, Inc. All rights reserved.第43頁(yè)/共64頁(yè)第44頁(yè)/共64頁(yè)第45頁(yè)/共64頁(yè)error sampling small a xCopyright 2000 by Harcourt, Inc. All rights reserved.第46頁(yè)/共64頁(yè)XclSZ ERRORSAMPLING SMALLCopyright 2000 by Harcourt, Inc. All rights reserved.第47頁(yè)/共64頁(yè)XclSZ ECopyright 2000 by Harcourt, Inc. Al

10、l rights reserved.第48頁(yè)/共64頁(yè)EX Copyright 2000 by Harcourt, Inc. All rights reserved.第49頁(yè)/共64頁(yè)nSSxCopyright 2000 by Harcourt, Inc. All rights reserved.第50頁(yè)/共64頁(yè)nSZXclCopyright 2000 by Harcourt, Inc. All rights reserved.第51頁(yè)/共64頁(yè)第52頁(yè)/共64頁(yè)第53頁(yè)/共64頁(yè)2EzsnCopyright 2000 by Harcourt, Inc. All rights reserve

11、d.第54頁(yè)/共64頁(yè)2EzsnCopyright 2000 by Harcourt, Inc. All rights reserved.第55頁(yè)/共64頁(yè)Suppose a survey researcher, studying expenditures on lipstick, wishes to have a 95 percent confident level (Z) and a range of error (E) of less than $2.00. The estimate of the standard deviation is $29.00.Copyright 2000 b

12、y Harcourt, Inc. All rights reserved.第56頁(yè)/共64頁(yè)2Ezsn200. 200.2996. 1200. 284.56242.28808Copyright 2000 by Harcourt, Inc. All rights reserved.第57頁(yè)/共64頁(yè)Suppose, in the same example as the one before, the range of error (E) is acceptable at $4.00, sample size is reduced.Copyright 2000 by Harcourt, Inc.

13、All rights reserved.第58頁(yè)/共64頁(yè)2Ezsn200. 400.2996. 1200. 484.56221.14202Copyright 2000 by Harcourt, Inc. All rights reserved.第59頁(yè)/共64頁(yè)99% ConfidenceCalculating Sample Size1389265.372253.7422)29)(57. 2(n23476325.182453.7424)29)(57. 2(n2Copyright 2000 by Harcourt, Inc. All rights reserved.第60頁(yè)/共64頁(yè)nppornpqps