Descriptive Statistics Flashcards

patingin ng big deck

1
Q
• Used in Descriptive studies
• Means of describing the nature and characteristics of the event under investigation
A

Descriptive Statistics

2
Q

what is the initial step in data analysis of ANALYTIC RESEARCH?

A

Descriptive statiscs

Dadaan muna ng descriptive Statistics → inferential → analytic

3
Q

Purpose of Descriptive statistics

just make uhmmm feel it

A
• presenting of data
• Summarizing data
4
Q

Descriptive Statistics

Give the examples of summarizing data

familiarize lang vebs, wag pahirapan sarili

A
• Statistical tables
• Statistical graphs
• Measures of Central Tendency (quantitative)
• Measures of Dispersion or Variability (quantitative)
• Measures of Position or Location (quantitative)
• Rates and Ratios (Proportion - Quali)
• Frequency Distribution (Table with frequency - Quali )

FAMILIARIZE! para di kabahan dughan

5
Q

These are measures that describe a typical or representative value in a group of observations.

A

Measures of Central Tendency

6
Q

Measures of Central Tendency

What are the types of presentations:

A
• Mean
• Mode
• Median
7
Q

Layman’s concept of “average”

=

A

mean

8
Q

Population mean -
Sample mean –

A

Population mean – μ
Sample mean – x (eto lagi mas cinocompute)

9
Q

If u see this card

A

Familiarize the formula of mean

10
Q

Measures of Central Tendency

• Center of gravity in a set of observations
• Sensitive to extreme values
A

Mean

11
Q

Measures of Central Tendency

if there is OUTLIER in a mean, what will happen?

A

the mean is swayed towardsthe extreme side

12
Q

Measures of Central Tendency

Used especially when other statistical techniques like tests of hypothesis are to be applied to the data

A

Mean

13
Q

Measures of Central Tendency

T or F

mean is the least common measure for central tendency?

A

F

it is bobo ka ha :P

14
Q

Mean - T or F

Not easy to understand, and complex to calculate

A

F

EASY and SIMPLE

15
Q

Mean - T or F

Based on all the values and rigidly defined

A

T

16
Q

Mean - T or F

It is easy to understand even if some of the details of the data are lacking

A

T

diko rin alam accrding kay polly to

17
Q

Mean - T or F

Based on the position in the series?

A

F

NOT BASED - icocompute lahat eh

18
Q

Mean - T or F

Easy to locate in the graph

A

F

Cannot be located graphically

19
Q

Mean

What is the bias of MEAN?

A

JENO - eme UPWARD

20
Q

What conclusion does mean gives?

A

21
Q

Measures of Central Tendency

Middlemost value in a set of observations whose magnitudes have been ordered or arrayed.

A

Median

22
Q

What is the cardinal rule in MEDIAN?

A

should be in CHRONOLOGICAL ORDER

23
Q

Median - T or F

Very sensitive to extreme values

A

F

kaya mas favored to kesa sa mean dahil yung GITNA tinitignan

24
Q

What central tendency is used when distribution are markedly skewed?

A

Median

25
Q

If u see this card

A

SHAKE THAT PHAT ASSS

ene familiarize median location formula

26
Q

Median

If n is odd, what is the median?

A

Middle

27
Q

Median

if n is even, what is the median?

A

average of the 2 middle numbers

28
Q

Median - T or F

Median can be calculated in all distributions?

A

T

29
Q

Median - T or F

hard to locate graphically

A

F

30
Q

Median - T or F

for quanti only

A

F

Qualit and Quanti

31
Q

Median - T or F

harder to understand even for statistics bitches

A

F

can be understood even by you

32
Q

Median - T or F

it is based on all the values

A

F

gitna lang

33
Q

Median - T or F

Capable for further math treatment

A

F

hanggang median lang siya

34
Q

Median - T or F

Affected by fluctuation of sampling

A

T

35
Q

Measure of Central Tendency

It is the values that occurs most often, and used for categorical or numerical

A

Mode (Mo)

36
Q

Mode - T or F

THere may not be a mode?

A

T

not all data has identcal something

37
Q

Mode - T or F

Mode is readily comprehensible and easily calculated

A

T

38
Q

It is the “highlight” of the data set

A

Mode

39
Q

What central tendency are OA for extreme values

A

MEAN

get it cause its “mean” kaya oa

mode and median are not sensitive for extreme values

40
Q

Mode - T or F

value of mode can also be determined graphically.

A

T

41
Q

Mode - T or F

usually an actual value of an important part of the series.

A

T

42
Q

Mode - T or F

Always based on all observation and capable of more mathematical manipulations

A

F (for both)

43
Q

central tendencies that are affected GREATLY by sampling fluctuations

A

Median and Mode

44
Q
• Describes how data are distributed
• Measures of Shap – Symmetric or skewed
A

Frequency Distribution Shapes

45
Q

Best central tendency if the shape is skewer is ??!

A

Median

46
Q

what central tendency always PROJECT THE POINT in skewerisity

A

Mode

skewirisity = yung nag ssskewed yall know it

47
Q

Range
Variance
Standard deviation
Coefficient of Variation

A

Measures of Variability or Dispersion

48
Q

Difference Between Largest & Smallest Observations:

A

Range

49
Q

what is the formula for RANGE

A

X(largest) - X(smallest)

50
Q

Range - T or F

• Very sensitive to extreme values
• Mention the least and greatest value
A

Range

51
Q

Shows Variation About the Mean: – gaano kalayo sa mean

A

Variance

nasa question na sagot, bobo ka pag dimo alam :P jk

52
Q

if u see this card

A

go over the formula for variance

53
Q

We usually dont know the data for the POPULATION! for variance?

A

T

54
Q

Just the square root of the VARIANCE

A

Standard Deviation

55
Q

what is the basis of SD?

A

Mean

gaano kalayo sa mean; para magets check ppt ha

56
Q

is a measure of how dispersed the data is in relation to the mean?

A

Standard deviation

57
Q

A low standard deviation indicates that the values tend to be close to the mean, while a high standard deviation indicates that the values are spread out over a wider range.

A

use this card para magets mo SD

from innernet and gpt

58
Q
• Measure of Relative Variation
• Always presented as a pecenteage %
• Shows Variation Relative to Mean
• Used to Compare 2 or More Groups with different units of measurements
A

Coefficient of Variation

59
Q

if u see this card

A

go over the formul of COEFFICIENT OF VARIATION

60
Q

Not often computed, only when comparing two or more groups with two different unit of measurement

A

Coefficient of Variation

61
Q

Measures of Location or Position

Divides the distribution into 100 equal parts

A

Percentiles

62
Q

Measures of Location or Position

Divides the distribution into 10 = parts

A

Deciles

63
Q

Measures of Location or Position

Divides the distribution into 4 = segments

A

Quartiles

64
Q
• Measure of variation
• Also known as the Midspread: Spread in the middle 50%
A

Interquartile Range

65
Q

Difference between the third and the first quartiles: Q3 – Q1

A

Interquartile Range

Not affected by extreme values

66
Q

if u see this card

A

go over on how to describe qualitative data

67
Q
A