Research Methodology and Statistics
A researcher wants to compare mean Harris Hip Scores between two groups: 30 patients who received cemented total hip arthroplasty and 30 patients who received uncemented total hip arthroplasty. The data appears normally distributed based on histogram and Shapiro-Wilk testing. Standard deviations are similar between groups. Regarding the appropriate statistical test:
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An independent (unpaired) t-test is appropriate for comparing means between two independent groups w...
The t-test generates a t-statistic and corresponding p-value; if p is less than 0.05 (conventional a...
Chi-square test should be used here because there are two groups; t-test requires paired data; norma...
If the normality assumption was violated (non-normal distribution), the Mann-Whitney U test (also ca...
Effect size (such as Cohen's d for t-test) should be reported alongside p-values to indicate clinica...
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