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【正文】 nt groups Interval or ratio Oneway ANOVA Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Analysis of Variance Sum of squares ? ?? ???n icj1 12total)( SS XXij Copyright 169。 2022 by Harcourt, Inc. All rights reserved. ????njjjn12b e t w e e n)( SS XXAnalysis of Variance Sum of squares Copyright 169。 2022 by Harcourt, Inc. All rights reserved. w it hinbe tw e e nMSMSF ?Analysis of Variance Calculation of FRatio Copyright 169。 2022 by Harcourt, Inc. All rights reserved. ? Total ? Sum of Squares – SSTOTAL ? Degrees of Freedom – 1 where c=number of groups, n= number of observations in a group W I T H I NBET W EENMSMSF ?ANOVA Summary Table Source of Variation Copyright 169。 2022 by Harcourt, Inc. All rights reserved. ANOVA Summary Table Source of Variation ? Between Groups ? Sum of Squares – SSBETWEEN ? Degrees of Freedom – c1 where c=number of groups ? Mean SquaredMSBETWEEN – SSBETWEEN/c1 Copyright 169。 2022 by Harcourt, Inc. All rights reserved. 1??cSSMSb e tw e enb e tw e enAnalysis of Variance Mean Squares Between Copyright 169。 2022 by Harcourt, Inc. All rights reserved. ? ?? ???n icjj1 12w i t h i n)( SS XXijAnalysis of Variance Sum of squares Copyright 169。 2022 by Harcourt, Inc. All rights reserved. gr ou psw it hi nV ar ia nc egr ou psbe tw e enV ar ia nc eF?????Analysis of Variance FRatio Copyright 169。 2022 by Harcourt, Inc. All rights reserved. A ZTest for Differences of Proportions ? ?? ? ?????????10 0110 0162 5.21 ppS068.? Copyright 169。 2022 by Harcourt, Inc. All rights reserved. p1 = sample portion of successes in Group 1 p2 = sample portion of successes in Group 2 ??1 ? ?1) = hypothesized population proportion 1 minus hypothesized population proportion 1 minus Sp1p2 = pooled estimate of the standard errors of difference of proportions ZTest for Differences of Proportions Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Comparing Two Groups when Comparing Proportions ? Percentage Comparisons ? Sample Proportion P ? Population Proportion ? Copyright 169。 2022 by Harcourt, Inc. All rights reserved. Degrees of
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