Stat-101, Quiz 3
Majmaa’ah University
Engineering College
Stat 101
24/5/1431
Name:
Group: 3
Academic Number:
Quiz (3)
1. Rewrite the following statements after correction.
a. Grouped data: are presented in the form of a frequency distribution table.
b. Values that are very small or very large relative to the majority of the values in a
data set are called mean values.
c. The mode is the value that occurs with the lowest frequency in a data set
d. The range is obtained by taking the difference between the mean and the median
of the data set.
e. Population variance = 𝑠
1
2
=
∑ 𝑓(𝑚−𝑥̅ )2
𝑛−1
Stat-101, Quiz 3
2. The following table gives the frequency distribution of the number of
orders received each day during the past 60 days at the office of a mailorder company.
Number of Orders
10 - 12
13 - 15
16 - 18
19 - 21
Number of Days
8
14
22
16
Calculate the Variance and Standard Deviation.
2