Median charges for coronary bypass at 17 hospitals in North Carolina

Data for Exercises 5.104 and 6.43

Bypass

Format

A data frame/tibble with 17 observations on two variables

hospital

a factor with levels Carolinas Med Ct, Duke Med Ct, Durham Regional, Forsyth Memorial, Frye Regional, High Point Regional, Memorial Mission, Mercy, Moore Regional, Moses Cone Memorial, NC Baptist, New Hanover Regional, Pitt Co. Memorial, Presbyterian, Rex, Univ of North Carolina, and Wake County

charge

median charge for coronary bypass

Source

Consumer's Guide to Hospitalization Charges in North Carolina Hospitals (August 1994), North Carolina Medical Database Commission, Department of Insurance.

References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

Examples

EDA(Bypass$charge)
#> [1] "Bypass$charge"

#>     Size (n)      Missing      Minimum       1st Qu         Mean       Median 
#>       17.000        0.000    24810.000    29359.000    32406.294    32428.000 
#>       TrMean       3rd Qu         Max.       Stdev.         Var.      SE Mean 
#>    32406.294    34919.500    38578.000     3590.560 12892118.346      870.839 
#>       I.Q.R.        Range     Kurtosis     Skewness     SW p-val 
#>     5560.500    13768.000       -0.774       -0.311        0.936 
t.test(Bypass$charge, conf.level=.90)$conf
#> [1] 30885.91 33926.68
#> attr(,"conf.level")
#> [1] 0.9
t.test(Bypass$charge, mu = 35000)
#> 
#> 	One Sample t-test
#> 
#> data:  Bypass$charge
#> t = -2.9784, df = 16, p-value = 0.00887
#> alternative hypothesis: true mean is not equal to 35000
#> 95 percent confidence interval:
#>  30560.20 34252.39
#> sample estimates:
#> mean of x 
#>  32406.29 
#>