DeterminingSampleSizePPT学习教案

1、会计学1DeterminingSampleSize第1页/共64页Copyright 2000 by Harcourt, Inc. All rights reserved.第2页/共64页第3页/共64页第4页/共64页第5页/共64页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页/共64页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页/共64页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页/共64页X第9页/共64页NXi Copyright 2000 by Harcourt, Inc. All rights reserved.第10页/共64页nXXiCopyright 2000 by Harcourt, Inc. All rights reserved.第11页/共64页Number of Sales Calls Per Day by SalespersonsNumber ofSalesperson Sales callsMike 4Patty 3Bil

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

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

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

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

8、yright 2000 by Harcourt, Inc. All rights reserved.第36页/共64页Population DistributionSample DistributionSampling Distribution第37页/共64页 Population Distributionx第38页/共64页Sample Distribution_CXS第39页/共64页Sampling DistributionXSXX第40页/共64页第41页/共64页Copyright 2000 by Harcourt, Inc. All rights reserved.第42页/共6

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

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

11、d.第54页/共64页2EzsnCopyright 2000 by Harcourt, Inc. All rights reserved.第55页/共64页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页/共64页2Ezsn200. 200.2996. 1200. 284.56242.28808Copyright 2000 by Harcourt, Inc. All rights reserved.第57页/共64页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页/共64页2Ezsn200. 400.2996. 1200. 484.56221.14202Copyright 2000 by Harcourt, Inc. All rights reserved.第59页/共64页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页/共64页nppornpqps