Deck 2: Statistics and Data Analysis Basics

Question 1

Statistics is the study of _______ measures of the values associated with variables

A)verbal
B)pictorial
C)descriptive
D)numerical

Answer 1

numerical

Question 2

'Primary source data is better than secondary source data'. This statement is

A) true
B) false
C) neither true nor false
D) any of the above

Answer 2

false

Question 3

Celsius and Fahrenheit temperature scales are examples of interval levels of measurement

A) true
B) false
C) neither true nor false
D) any of the above

Answer 3

true

Question 4

The number of students on a college campus is a continuous variable

A) true
B) false
C) neither true nor false

Question 5

______refer to population characteristics while _____describe sample characteristics

A)statistic, parameter
B)parameter, statistic
C)regression, correlation
D)correlation, regression

Question 6

You are conducting a study to see whether a new experimental medication will cause bald men to grow hair. You divide your patients into 2 groups. To one group you give the medication. To the other group, you give a placebo. In this study, the correct terms for the taking of the medication and the growth of hair are the following.

A)both the medication and the hair growth are dependent variables
B)both the medication and the hair growth are independent variables
C)the medication is the dependent variable, and the hair growth is the independent variable
D)the medication is the independent variable, and the hair growth is the dependent variable

Question 7

The concept of a variable implies that the values of every characteristic of an item are different

A) true
B) false
C) neither true nor false
D) any of the above

Question 8

Which of the following definitions is the definition of the MEAN

A)the mean is the largest value
B)the mean is the value that half of the entries are below and half of the entries are above
C)the mean is the value that has the highest frequency
D)the mean is the average calculated by adding up all the values and dividing by the number

Question 9

Which of the following definitions is the definition of the MEDIAN?

A)the median is the value that half of the entries are below and half of the entries are above
B)the median is the value that has the highest frequency
C)the median is the largest value
D)the median is the average calculated by adding up all the values and dividing by the

Question 10

What is the median of the following set of numbers? {12,8,13,4,7,6,3,3,15}

A)12
B)8
C)7
D)7.5

Question 11

A teacher had 5 students who took a test. Their test scores are as follows: 62, 86, 72, 66, 72. What is the mode of the test

A)72
B)86
C)62
D)86.

Question 12

Students A,B and C took part in a recent quiz. Student A scored 50 points, Student B scored 60 points and Student C scored 70 points. What is the mean of this quiz

A)60
B)50
C)70
D)45

Question 13

Contestants of a competition have reached the semi-finals. After the semi-finals, their score are of below. Those whose score is lower than the median will not be able to enter the finals, so who managed to enter the finals. Here is the list of contestants: Anoop - 70 Points, Babu - 50 Points, Cindu - 65 Points, Das - 90 Points, Emy - 55 Points, Fasna - 85 Points, Gopi - 100 Points

A)babu, cindu and emy
B)anoop, das, fasnn and gopi
C)anoop, babu, cindu and emy
D)babu, cindu, das, gopi

Question 14

What is the median in the following numbers: 19, 21, 18, 17, 18, 22, 46

A)19
B)18
C)17
D)21

Question 15

A teacher had 5 students who took a test. Their test scores are as follows: 62, 86, 72, 66, 72. What is the mode of the test

A)72
B)86
C)62
D)66

Question 16

Which of the curves is more peaked than the normal curve?

A)mesokurtic
B)platykurtic
C)lapokurtic
D)skewness

Question 17

What will be the range of "r" when we find that the dependent variable increases as the independent variable increases

A)0 to -0.05
B)1 to 2
C)0.1 to 1
D)2 to 3

Question 18

Which of the following correlation coefficients shows the highest degree of association

A)?1
B)1
C)0.9
D)both a & b

Question 19

The sum of deviations taken from arithmetic mean is

A)minimum
B)zero
C)maximum
D)none of the above is possible

Question 20

Which of the following statements is not correct

A)extreme value in data affects the mean
B)mean is also known as average
C)some data sets do not have mean
D)at times weighted mean is much better than the simple mean

Question 21

Which of the following is not true in respect of mean deviation

A)it is simple to understand
B)it considers each & every item in a series
C)it is capable of further algebraic treatment
D)the extreme items have less effect on its magnitude

Question 22

What is the purpose of a summary table?

A)to see differences between or among categories
B)to list data to create a bar or pie chart
C)this is the only way to present categorical data in numerical form
D)to sum the values of responses to a survey

Question 23

A graphical representation of a frequency distribution is called a__________________

A)scatter diagram
B)histogram
C)time-series plot
D)stem-and-leaf plot

Question 24

The width of a class interval in a frequency distribution (or bar chart) will be approximately equal to the range of the data divided by the ______________ .

A)highest value in the data set
B)average of the data set
C)lowest value in the data set
D)number of class intervals