ffood {ipsRdbs}

Service (waiting) times (in seconds) of customers at a fast-food restaurant.

Description

Service (waiting) times (in seconds) of customers at a fast-food restaurant.

Usage

ffood

Format

A data frame with 10 rows and 2 columns:

AM

Waiting times for customers served during 9-10AM

PM

Waiting times for customers served during 2-3PM

Examples

 summary(ffood)
 # 95% Confidence interval for the mean waiting time usig t-distribution
 a <- c(ffood$AM, ffood$PM)
 mean(a) + c(-1, 1) * qt(0.975, df=19) * sqrt(var(a))/sqrt(20) 
 # Two sample t-test for the difference between morning and afternoon times
 t.test(ffood$AM, ffood$PM)