EDA

Question 1

-the science and
the art which deals on
interpreting data from facts
and information.
-a science which deals with
the methods of gathering:
presentation, analysis and
interpretation of data.

Answer 1

Statistics

Question 2

summarizes and organizes
characteristics of a data set. A data set is a
collection of responses or observations from a
sample or entire population.

Answer 2

Descriptive statistics

Question 3

is a
collection of responses or observations from a
sample or entire population.

Answer 3

Data set

Question 4

Make inferences and draw conclusions about a population based on sample data. Examples: Hypothesis testing, confidence
intervals, regression analysis, ANOVA (analysis of variance), chi-square tests, t-tests, etc.

Answer 4

Inferential Statistics

Question 5

There are three main types of descriptive statistics:

Answer 5

Distribution, Central Tendency, Variability

Question 6

One of main approaches to measuring central tendency that involves calculating central tendency measures from grouped or categorized data. Grouping data involves creating intervals or classes to organize the data into
ranges.

Answer 6

Grouped central tendency

Question 7

One of main approaches to measuring central tendency that refers to calculating central
tendency measures directly from the individual data points without any prior grouping or categorization.

Answer 7

Ungrouped central tendency

Question 8

the sum of all values divided by the
total number of values.

Answer 8

Mean

Question 9

the middle number in an ordered
dataset.

Answer 9

Median

Question 10

the most frequent value

Answer 10

mode

Question 11

Measures of variability give you a sense of how spread out the response values are. True or False?

Answer 11

True

Question 12

Values that divide your data into quarters (ex. 1st, 2nd , 3rd, 4th quarters)

Answer 12

Quartile

Question 13

is the cut off point for a certain fraction of a sample

Answer 13

Quantiles

Question 14

sort data into ten equal parts (ex. 1st decile, 2nd decile, up to 10th decile)

Answer 14

Deciles

Question 15

a number where a certain percentage of scores fall below that number

Answer 15

Percentile

Question 16

is also referred to as spread, scatter or dispersion. It is most measured with range, interquartile range, standard deviation, variance.

Answer 16

Variability

Question 17

the difference between the highest and lowest values

Answer 17

range

Question 18

the range of the middle half of a
distribution

Answer 18

Interquartile range

Question 19

average distance from the mean

Answer 19

standard deviation

Question 20

average of squared distances from the mean

Answer 20

variance

Question 21

is the “middle” value in the first half of the rank-ordered data set.

Answer 21

Q1

Question 22

is the median value in the set

Answer 22

Q2

Question 23

is the “middle” value in the second half of the rank-ordered data set.

Answer 23

Q3

Question 24

Standard deviation (s) is the average amount of variability in your data set. It tells you on average, how far each score lies from the mean. The larger the standard deviation, the more variable the data set is. True or False?

Answer 24

True

Question 25

Variance is the average of squared deviations from the mean. Variance reflects the degree of spread in the data set. The more spread the data, the larger the variance is in relation to the mean. True or False?

Answer 25

True

Question 26

is a statistical measure of the dispersion of data points around the mean.

Answer 26

Coefficient of Variation (relative standard deviation)

Question 27

the number of occurrences (tally)

Answer 27

frequency (fi)

Question 28

the highest value within the class

Answer 28

Upper class limit (UCL)

Question 29

t h e lowest value within t h e class

Answer 29

Lower class limit (LCL)

Question 30

the highest value within the class + 0.5

Answer 30

Upper class boundary (UCB)

Question 31

the lowest value within the class - 0.5

Answer 31

Lower class boundary (LCB)

Question 32

the average value of the class limits

Answer 32

class mark (Mi)

Question 33

It tells the proportion of the total number of observations associated with e a c h category.

Answer 33

Relative Frequency Distribution

Question 34

It is the sum of the first frequency a n d all frequencies below it in a frequency distribution. You must a d d a value with the next value then add the sum with the next value again and so on till the last. The last cumulative frequency will b e the total sum of all frequencies.

Answer 34

Cumulative Frequency Distribution (F)

Question 35

are individual facts, statistics, or items of information, often numeric.

Answer 35

Data

Question 36

Types of Data

Answer 36

Quantitative and Qualitative

Question 37

Data that can be measured with numbers, such as duration or speed

Answer 37

Quantitative

Question 38

non-numerical data that is categorical, such as yes/no responses or eye color

Answer 38

Qualitative

Question 39

whole numbers that can’t be broken down, such as a number of items

Answer 39

Discrete

Question 40

whole numbers that can be broken down, such as height or weight

Answer 40

continuous

Question 41

types of continuous

Answer 41

Interval and Ratio

Question 42

numbers with known differences between variables, such as time

Answer 42

Interval

Question 43

Numbers that have measurable intervals where difference can be determined, such as height or weight

Answer 43

Ratio

Question 44

Data used for naming variables, such as hair color

Answer 44

Nominal

Question 45

Types of Qualitative

Answer 45

Nominal and Ordinal

Question 46

Data used to describe the order of values, such as 1=happy, 2=neutral, 3=unhappy

Answer 46

Ordinal

Question 47

is the graphical representation of information and data.

Answer 47

DATA visualization

Question 48

Give 8 types of DATA VISUALIZATION CHART

Answer 48

Line chart, Area Chart, Bar Chart, Gantt Chart, Histogram, Scatter Plot, Pie Chart, Map Chart

Question 49

Types of Bar Graph/Chart

Answer 49

Horizontal, Grouped, Vertical

Question 50

display trends overtime

Answer 50

Line Chart

Question 51

a line chart with areas below the lines filled with colors

Answer 51

Area Chart

Question 52

display trends with multiple variables

Answer 52

Bar Chart

Question 53

showing activities (tasks or events) displayed against time.

Answer 53

Gantt Chart

Question 54

display the shape and spread of continuous dataset samples

Answer 54

Histogram

Question 55

show correlation in a dataset

Answer 55

Scatter Plot

Question 56

show the contribution of data point inside a whole dataset

Answer 56

Pie Chart

Question 57

show data with location as variable

Answer 57

Map Chart