Question

Homework - Chapter 1. Student name: Question #5 These are the number of holiday gifts purchased by 25 families randomly interviewed at a local mall at the end of the holiday season: 22, 18, 22, 26, 19, 14, 23, 27, 2, 18, 28, 28, 11, 16, 34, 28, 13, 21, 32, 17, 6, 29, 23, 22, 19 -Question (a): Make a grouped frequency table Frequency Percent Midpoint Interval 30-34 25-29 20-24 15-19 10-14 5-9 0-4 -Question (): Make a histogram (include title, and labels for both axes).

Answer 1

5(a)

INTERVAL	FREQUENCY	PERCENT	MIDPOINT
30-34	2	8%	32
25-29	6	24%	27
20-24	5	20%	22
15-19	6	24%	17
10-14	4	16%	12
5-9	1	4%	7
0-4	1	4%	2

5(b)

histogram

using R programming language , coding is given below

>x<-c(22,18,22,26,19,14,13,27,2,18,28,28,11,16,34,28,13,21,32,17,6,29,23,22,19)

>hist(x,col="grey",main="histogram",xlab="x-axis",ylab="y-axis")

histogram 6 4 y-axis 2 0 0 5 10 15 20 25 30 35 x-axis

excel can also be used here.

6(a)

score	frequency	percent
1	2	10%
2	4	20%
3	8	40%
4	4	20%
5	2	10%

(b)

histogram using R programming language. coding is given below

> y<-c(3,2,3,4,1,3,3,4,5,2,3,5,2,3,3,4,1,3,2,4)
> hist(y,col="grey",main="histogram", xlab="score",ylab="frequency")

histogram 8 frequency 4 0 TTT 1 3 5 score