WorksheetsIntroduction to Statistics Descriptive
Total questions: 24
Worksheet time: 24mins
In a survey conducted by a market research firm, which of the following types of variables are considered to be numerical and can be ordered or ranked?
Qualitative
Quantitative
Sequential
Non-probabilistic
In a survey, what type of variables are variables that can be placed into distinct categories, according to some characteristic or attribute?
Qualitative
Quantitative
Sequential
Non-probabilistic
The number of students in different classes in a school, the number of cars in a parking lot are examples of
Discrete variables
Continuous variables
Ordinal variables
Nominal variables
Time, heights and temperatures are examples of
Discrete variables
Continuous variables
Ordinal variables
Nominal variables
________ is that part of the population from which information is collected.
Sample
Variable
Parameter
Random sampling
Tell if the statement if Descriptive or Inferential
A recent survey of 2000 adults having a PhD reported that the average number of research papers published per year is more than 10.
Inferential
Descriptive
What is the median number of books read by a group of students?
1.5 books
2.60 books
4 books
2 books
What is the range of the following data set?
{2, 9, 5, 4, 7, 8}
6
7
5
8
Over the basketball season each game was a different score.
What is the mean(average) of the set?
12
13
15
16
There are 700 dogs. How many animals are there total?
1400
2100
1800
1100
The mode of the data is ....
dogs
cats
fishes
hamsters
Which of the following isn't a measure of central tendency?
mean
range
median
mode
A group of students have the following distribution for their test scores:
min: 124
Q1: 155
median: 164
Q3: 188
max: 231
The interquartile range is:
107
164
33
67
Consider a class of students with the following heights:
150cm 170cm 160cm 170cm 165cm 180cm
If the tallest student's height of 180cm was changed to 175cm, what would happen to the standard deviation of the heights?
stay the same
decrease
increase
Given the sales data for a company: $100, $200, $300, $400, $500 what is the 0.5 percentile?
$200
$400
$500
$300
What is the 25th percentile of the test scores: 85, 90, 92, 95, 98?
90
95
98
92
Given the data set: 1, 2, 3, 4, 5 what is the 0.75 percentile?
2
4
5
3
Given the data set: 1, 2, 3, 4, 5 what is the interquartile range?
2
4
5
3
What is the range of this data?
30
40
50
60
What is the interquartile range?
The span between the first quartile and the third quartile
The span between the lowest score and the highest score
The simplest measure of variability to calculate
one-fourth of a distribution of scores
Descriptive statistics consists of methods of organizing, summarizing and presenting data in an informative way.
True
False
What is the mode of the data
7
8
9
8 and 9
What is the first quartile of the data?
5.5
6.5
8
9
