Chapter 2 Project | Beginning Statistics, 3rd Edition

Fast Food Comparison

For three fast-food restaurants, a random sample of service times (in seconds) was taken. The results are below.

Service Time (in Seconds)
Kim's Kajun Kitchen	Chez Carolyn	Emily's Eatery
$111$	$109$	$99$
$94$	$84$	$63$
$57$	$93$	$53$
$80$	$123$	$82$
$78$	$97$	$75$
$109$	$56$	$112$
$92$	$79$	$65$
$34$	$57$	$55$
$67$	$32$	$65$
$122$	$68$	$86$
$95$	$45$	$94$
$46$	$99$	$87$
$103$	$82$	$62$
$110$	$76$	$68$
$93$	$54$	$61$
$86$	$84$	$49$
$75$	$86$	$37$
$49$	$73$	$46$
$61$	$79$	$65$
$82$	$67$	$86$
$76$	$96$	$48$
$92$	$112$	$95$
$65$	$94$	$33$
$92$	$82$	$49$
$94$	$96$	$76$
$106$	$125$	$35$
$112$	$98$	$68$
$83$	$120$	$57$
$72$	$78$	$41$
$119$	$63$	$49$

For each restaurant's service times, do the following.

Create a frequency distribution with the given classes. Include the frequency, class boundaries, relative frequency, and cumulative frequency of each class.

Class
$30$ – $49$
$50$ – $69$
$70$ – $89$
$90$ – $109$
$110$ – $129$

Use the frequency distribution to construct a histogram of the data.

Based on the graphical descriptions of the data you created in part 1, which fast-food restaurant do you believe consistently has the shortest service times? Explain why.