Length of long-distance phone calls for a small business firm

Source: R/BSDA-package.R

Data for Exercise 6.95

Phone

Format

A data frame/tibble with 20 observations on one variable

time

duration of long distance phone call (in minutes)

References

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

Examples


qqnorm(Phone$time)
qqline(Phone$time)

shapiro.test(Phone$time)
#> 
#> 	Shapiro-Wilk normality test
#> 
#> data:  Phone$time
#> W = 0.86994, p-value = 0.01172
#> 
SIGN.test(Phone$time, md = 5, alternative = "greater")
#> 
#> 	One-sample Sign-Test
#> 
#> data:  Phone$time
#> s = 9, p-value = 0.7483
#> alternative hypothesis: true median is greater than 5
#> 95 percent confidence interval:
#>  3.058559      Inf
#> sample estimates:
#> median of x 
#>        4.75 
#> 
#> Achieved and Interpolated Confidence Intervals: 
#> 
#>                   Conf.Level L.E.pt U.E.pt
#> Lower Achieved CI     0.9423 3.1000    Inf
#> Interpolated CI       0.9500 3.0586    Inf
#> Upper Achieved CI     0.9793 2.9000    Inf
#>