Tham khảo tài liệu 'product and process comparisons_13', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | . Comparing multiple proportions The Marascuillo procedure let pii data .12 .12 .12 .12 .153 . .153 .153 .14 .14 .21 let pjj data .153 .14 .21 .127 .14 . .21 .127 .21 .127 .127 let cont abs pii-pjj let rij sqrt chsppf .95 4 . sqrt pii 1-pii 300 pjj 1-pjj 300 set write decimals 3 print cont cont rij No individual contrast is statistically significant A difference is statistically significant if its value exceeds the critical range value. In this example even though the null hypothesis of equality was rejected earlier there is not enough data to conclude any particular difference is significant. Note however that all the comparisons involving population 4 come the closest to significance -leading us to suspect that more data might actually show that population 4 does have a significantly higher proportion of defects. NIST SEMATECH HOME tools RAIDS search SACK NEXT http div898 handbook prc section4 3 of 3 5 1 2006 10 39 11 AM . References ENGINEERING STATISTICS HANDBOOK hW tools raids lỉEÂtCH BACK Nixf 7. Product and Process Comparisons . References Primary Agresti A. and Coull B. A. 1998 . Approximate is better than exact References for interval estimation of binomial proportions The American Statistician 52 2 119-126. Berenson . and Levine . 1996 Basic Business Statistics Prentice-Hall Englewood Cliffs New Jersey. Bhattacharyya G. K. and R. A. Johnson 1997 . Statistical Concepts and Methods John Wiley and Sons New York. Birnbaum Z. W. 1952 . Numerical tabulation of the distribution of Kolmogorov s statistic for finite sample size Journal of the American Statistical Association 47 page 425. Brown L. D. Cai T. T. and DasGupta A. 2001 . Interval estimation for a binomial proportion Statistical Science 16 2 101-133. Diamond W. J. 1989 . Practical Experiment Designs Van-Nostrand Reinhold New York. Dixon W. J. and Massey . 1969 . Introduction to Statistical Analysis McGraw-Hill New York. Draper N. and Smith H. 1981 . .
