Calculation of Descriptive Statistics

A survey on 25 people on how they got news in the following data

M M N M R

N N R T T

R N T M R

R M T N M

R N R N T

Construct a frequency distribution for the data (N = newspaper, T =
television, R = radio, M = Magazine)

Construct a pie graph for the data and analyze the results.

2. Below are the grades of 50 students on a marketing test.

73 65 82 70 45 50 70 54 75 32

67 75 65 60 75 87 83 40 72 64

58 75 89 70 73 55 61 78 93 89

51 43 59 38 65 71 75 85 65 85

49 97 55 60 76 75 35 63 69 45

Construct a frequency distribution for the above data.

Construct a histogram for the data

Construct a frequency polygon for the data

Construct a stem and leaf display of the data.

3. Find the a) mean, b) median, c) mode, and d) midrange, for the given
set of data.



17 11 15 17 12 22 15 10

4. When a sample consists of a random selection of groups of units, the
sample is said to be a ____________ sample.

a) cluster b) biased c) stratified d) systematic e) random

5. (2 pts) In a circle graph a frequency of 126 out of a total of 1512
is to be represented. How large should the central angle for this sector
be?

a) 15( b) 30( c) 60 ( d) 45( e) 36(

6. (2 pts) Samantha’s mean average on eight exams is 91. Find the sum
of her scores.

7. (4 pts) Use the frequency polygon below to answer the following
questions

Number of Books Read in One Month

How many children read 9 books in one month?

How many children were surveyed?