1、會計(jì)學(xué)1DeterminingSampleSize第1頁/共64頁Copyright 2000 by Harcourt, Inc. All rights reserved.第2頁/共64頁第3頁/共64頁第4頁/共64頁第5頁/共64頁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/共64頁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/共64頁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/共64頁X第9頁/共64頁NXi Copyright 2000 by Harcourt, Inc. All rights reserved.第10頁/共64頁nXXiCopyright 2000 by Harcourt, Inc. All rights reserved.第11頁/共64頁Number of Sales Calls Per Day by SalespersonsNumber ofSalesperson Sales callsMike 4Patty 3Bil

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

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

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

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

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

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

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

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