User Guide for the TIMSS International Database.pdf - TIMSS and ...

More documents

Recommendations

Info

C H A P T E R 3 S A M P L I N G 3.7 Sampling Weights Appropriate estimation of population characteristics based on the TIMSS samples requires that the TIMSS sample design be taken into account in all analyses. This is accomplished in part by assigning a weight to each respondent, where the sampling weight properly accounts for the sample design, takes into account any stratification or disproportional sampling of subgroups, and includes adjustments for non-response. 2 The students within each country were selected using probability sampling. This means that the probability of each student being selected as part of the sample is known. The inverse of this selection probability is the sampling weight. In a properly selected and weighted sample, the sum of the weights for the sample approximates the size of the population. As is the case in TIMSS, the sum of the sampling weights for a sample is an estimate of the size of the population of students within the country in the sampled grades. The sampling weights must be used whenever population estimates are required. The use of the appropriate sampling weights ensures that the different subgroups that constitute the sample are properly and proportionally represented in the computation of population estimates. Tables 3.3 and 3.4 present the sample sizes and the estimate of the population size (sum of the weights) for each participating country in Populations 1 and 2, respectively. 2 Sampling weights can only be computed when the probability of selection is known for all students. 3 – 1 2 T I M S S D A T A B A S E U S E R G U I D E
S A M P L I N G C H A P T E R 3 Table 3.3 Sample Information for TIMSS Population 1 Countries Third Grade Fourth Grade COUNTRY Sample Sum of Maximum Sample Sum of Maximum Size Weights Jacknifing Zones Size Weights Jacknifing Zones Australia 4741 232333.3 74 6507 237328.1 74 Austria 2526 86043.5 68 2645 91390.7 68 Canada 7594 371166.0 75 8408 389159.8 75 Cyprus 3308 9740.3 74 3376 9995.4 74 Czech Republic 3256 116051.5 73 3268 120406.0 73 England 3056 531682.1 67 3126 534922.4 67 Greece 2955 98999.8 75 3053 106181.0 75 Hong Kong 4396 83846.6 62 4411 89901.4 62 Hungary 3038 116778.6 75 3006 117228.1 75 Iceland 1698 3734.6 75 1809 3739.3 75 Iran, Islamic Rep. 3361 1391859.1 75 3385 1433314.5 75 Ireland 2889 58502.8 73 2873 60496.9 73 Israel . . . 2351 66967.0 44 Japan 4306 1388749.3 74 4306 1438464.9 74 Korea 2777 607007.1 75 2812 615004.3 75 Kuwait . . . 4318 24071.0 75 Latvia (LSS) 2054 15120.7 59 2216 18882.5 59 Netherlands 2790 171561.2 52 2524 173406.9 52 New Zealand 2504 48385.9 75 2421 52254.3 75 Norway 2219 49035.8 70 2257 49896.4 70 Portugal 2650 114774.8 72 2853 133186.2 72 Scotland 3132 59393.4 65 3301 59053.7 65 Singapore 7030 41904.0 75 7139 41244.0 75 Slovenia 2521 27453.4 61 2566 27685.1 61 Thailand 2870 883764.8 75 2992 864525.4 75 United States 3819 3643393.3 59 7296 3563795.3 59 T I M S S D A T A B A S E U S E R G U I D E 3 – 1 3
Page 1 and 2: International Association for the E
Page 3 and 4: Contents Chapter 1: Overview of TIM
Page 5 and 6: C O N T E N T S 7.3 Codebook Files
Page 7 and 8: C O N T E N T S Table 7.7 Classific
Page 9 and 10: Chapter 1 Overview of TIMSS and the
Page 11 and 12: I N T R O D U C T I O N C H A P T E
Page 17 and 18: Chapter 2 TIMSS Instruments and Boo
Page 19 and 20: I N S T R U M E N T S C H A P T E R
Page 29 and 30: Chapter 3 Sampling and Sampling Wei
Page 31 and 32: S A M P L I N G C H A P T E R 3 Tab
Page 33 and 34: S A M P L I N G C H A P T E R 3 tes
Page 35 and 36: S A M P L I N G C H A P T E R 3 3.5
Page 37 and 38: S A M P L I N G C H A P T E R 3 Fig
Page 39: S A M P L I N G C H A P T E R 3 Fig
Page 43 and 44: S A M P L I N G C H A P T E R 3 3.8
Page 45 and 46: S A M P L I N G C H A P T E R 3 SEN
Page 47 and 48: S A M P L I N G C H A P T E R 3 sel
Page 49 and 50: C H A P T E R 4 D A T A C O L L E C
Page 61 and 62: C H A P T E R 5 S C A L I N G 5.2 T
Page 63 and 64: C H A P T E R 5 S C A L I N G Likew
Page 65 and 66: C H A P T E R 5 S C A L I N G 5.6 L
Page 67 and 68: C H A P T E R 5 S C A L I N G the r
Page 69 and 70: C H A P T E R 6 A C H I E V E M E N
Page 79 and 80: C H A P T E R 7 D A T A B A S E F I
Page 91 and 92:
C H A P T E R 7 D A T A B A S E F I
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
C H A P T E R 8 S A M P L I N G V A
Page 123 and 124:
C H A P T E R 8 S A M P L I N G V A
Page 125 and 126:
C H A P T E R 9 P E R F O R M I N G
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
R E F E R E N C E S Gonzalez, E.J.
Page 171 and 172:
R E F E R E N C E S Wilson, M.R. (1
Page 173 and 174:
A C K N O W L E D G M E N T S Inter
Page 175 and 176:
A C K N O W L E D M E N T S Austral
Page 177 and 178:
A C K N O W L E D G M E N T S Latvi
Page 179 and 180:
A C K N O W L E D M E N T S TIMSS A
Page 181:
A C K N O W L E D G M E N T S Quali
show all

User Guide for the TIMSS International Database.pdf - TIMSS and ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?