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    A researcher conducts a chi-square test to determine whether there is a statistically significant difference in the rate of current anxiety disorder between an intervention and control group at baseline (pre-treatment visit). Explain why the researcher would like to retain the null hypothesis stating no significant differences in the proportion of cases with anxiety disorder in the two groups.

    gender * anxiety Crosstabulation
    Anxiety Total
    0 1
    gender 0 Count 87 16 103
    % within gender 84.5% 15.5% 100.0%
    % within anxiety 52.4% 29.6% 46.8%
    % of Total 39.5% 7.3% 46.8%
    1 Count 79 38 117
    % within gender 67.5% 32.5% 100.0%
    % within anxiety 47.6% 70.4% 53.2%
    % of Total 35.9% 17.3% 53.2%
    Total Count 166 54 220
    % within gender 75.5% 24.5% 100.0%
    % within anxiety 100.0% 100.0% 100.0%
    % of Total 75.5% 24.5% 100.0%

    Chi-Square Tests
    Value df Asymp. Sig. (2-sided) Exact Sig. (2-sided) Exact Sig. (1-sided)
    Pearson Chi-Square 8.492a 1 .004
    Continuity Correctionb 7.602 1 .006
    Likelihood Ratio 8.723 1 .003
    Fisher's Exact Test .005 .003
    Linear-by-Linear Association 8.453 1 .004
    N of Valid Cases 220
    a. 0 cells (0.0%) have expected count less than 5. The minimum expected count is 25.28.
    b. Computed only for a 2x2 table

    Risk Estimate
    Value 95% Confidence Interval
    Lower Upper
    Odds Ratio for gender (0 / 1) 2.616 1.354 5.054
    For cohort anxiety = 0 1.251 1.076 1.454
    For cohort anxiety = 1 .478 .284 .805
    N of Valid Cases 220

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    https://brainmass.com/statistics/chi-squared-test/statistical-difference-509256

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    A researcher conducts a chi-square test to determine whether there is a statistically significant difference in the rate of current anxiety disorder between an intervention and control group at baseline (pre-treatment visit). Explain why the researcher would like to retain the null hypothesis stating no significant differences in the proportion of cases with anxiety disorder in the two groups.

    tx * anxiety Crosstabulation
    anxiety Total
    0 1
    Tx 0 Count 83 28 111
    % within tx 74.8% 25.2% 100.0%
    % within anxiety 50.0% 51.9% 50.5%
    % of ...

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