ss_smd: Sample Size Estimation: Standardized Mean Difference

In mbir: Magnitude-Based Inferences

Description

Estimates magnitude-based inferences upon planned sample size and d value. Based upon WG Hopkins Microsoft Excel spreadsheet.

Usage

ss_smd(exp, con, es)

Arguments

exp	planned sample size of experimental group
con	planned sample size of control group
es	planned Cohen's d

Details

Refer to vignette for further information.

References

Hopkins WG. (2006). Estimating sample size for magnitude-based inferences. Sportscience 10, 63-70. sportsci.org/2006/wghss.htm

Examples

ss_smd(exp = 20, con = 15, es = 0.6)

Example output

   n = 35
   es = 0.6

   Estimated:
   Magnitude-Based Inference 

        Very Unlikely Unlikely  Likely    
        "Negative"    "Trivial" "Positive"
MBI (%) "1.3"         "11.2"    "87.5"    

Inference: Likely Moderate Increase.

mbir documentation built on May 1, 2019, 10:11 p.m.