Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BIOEPI > MEASURES OF CENTRAL TENDENCY, DISPERSION, LOCATION > Flashcards

MEASURES OF CENTRAL TENDENCY, DISPERSION, LOCATION Flashcards

1
Q

Method of compressing mass of data for better comprehension and description

A

Summarizing Figures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Make use of the measures of central tendency, dispersion, and location

A

Summarizing Figures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Mean, median, and mode

Have the typical values; all values that represent all the observations

A

Measures of Central Tendency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

range, variance, and standard deviation

Describe the variability of observations

A

Measures of Dispersion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

percentile, decile and quartile

Shows relative position of an observation in an array

A

Measures of Location

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Tells us where the values tend to clump but not measure the spread of variability of data

A

Measures of Central Tendency

AKA measures of central location

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A single value that attempts to describe a set of data by identifying the central position within that set of data

A

Measures of Central Tendency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Measures of Central Tendency:
is the sum of the values of observations divided by the number of observations.
Sum of the observations ÷ number of observations

A

Mean

average

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Measures of Central Tendency:

Sensitive to different/ extreme observations; any change in the observation will change the mean value

A

Mean
Sum of the deviations of the observations from the mean is equal to zero
Point of balance or center of gravity of the distribution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Measures of Central Tendency:

Most popular and well known measure of central tendency

A

Mean

Used for discrete and continuous data

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

X: designate an _____
i: designates ______
𝛴: ______
X̅: _______

A

observation
position of an observation
summation notation
sample mean

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

μ: ______
N: # of items in the _____
n: # of items in the _____

A

population mean
population
sample mean

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Measures of Central Tendency:

The middle score for a set of data that has been arranged in order of magnitude

A

Median
(Odd: middle most observation
Even: mean of 2 middlemost observation)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Measures of Central Tendency:

Middle most observation in a set of observations put in numerical order in an array (ascending or descending)

A

Median

Not influence by outliers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Measures of Central Tendency:

The most frequently occurring value in a set of observation

A

Mode

can be determined for any type of variable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Measures of Central Tendency:

Used for categorical data, to know which is the most common category

A

Mode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Locations of Measures of Central Tendency: Types of Distribution:
Negatively skewed
Right to left
Mean is less than the median and mode

A

Negative Direction

18
Q

Locations of Measures of Central Tendency: Types of Distribution:
Normal (no skew), Center

A

Perfectly Symmetrical Distribution

19
Q

Locations of Measures of Central Tendency: Types of Distribution:
Positively skewed
Left to right
Mode is less than the median and mean

A

Positive Direction

20
Q 
Best Measure of Central Tendency:
Nominal : \_\_\_\_\_
Ordinal : \_\_\_\_\_
Interval/ Ratio (no skewed) : \_\_\_\_\_\_
Interval/ Ratio (skewed) : \_\_\_\_\_
A

Mode
Median
Mean
Median

21
Q

Measures the spread of variability of data

A

Measures of Dispersion aka Measures of Spread

22
Q

Used to describe the variability in a sample or population used in conjunction with a measure of central tendency

A

Measures of Dispersion

May be used for quantitative variables only

23
Q

Describe whether the population or sample is homogeneous or heterogeneous

A

Measures of Dispersion

24
Q

range, variance, standard deviation, and coefficient variation

A

Measures of Dispersion

25
Q

Measures of Dispersion:

Difference between the highest and lowest value, can measure the spread or variability

A

Range

simplest measure of dispersion

26
Q

Measures of Dispersion:

Used when you have ordinal data

A

Range

27
Q

Measures of Dispersion:
The average of the squared deviations from the mean
Measure of variability that takes the mean as the reference point

A

Variance

Units are incomprehensible

28
Q

Measures of Dispersion:
Square root of the variance
Unit is the same as that of the original set of observations

A

Standard Deviation

squared deviations

29
Q

Measures of Dispersion:
Measure of relative variation. Always a %
Expresses the SD as % of mean

A

Coefficient of Variation

SD ÷ Mean x 100

30
Q

Measures of Dispersion:
Shows variation relative to Mean
Used to compare 2 or more groups

A

Coefficient of Variation (CV)

31
Q

Determines the location/ position of a particular value in an array of distribution
Provide more details about a part of the entire distribution of observations in a give data

A

Measures of Location

Used for both qualitative and quantitative data

32
Q

Quartiles, deciles, percentiles

A

Measures of Location

33
Q

Measures of Location:

Points of distribution that divides the observation into 100 equal parts

A

Percentiles: Pi

1 of the 99 values of a variable which divides the distribution into 100 equal parts

34
Q

Measures of Location:
Points of distribution that divides the observation into 10 equal parts
1 of the 9 values of a variable which divides the distribution into 10 equal parts

A

Deciles: Di

Decile to Percentile: D1= P10

35
Q

Measures of Location:
Points of distribution that divides the observation into 4 equal parts
1 of the 3 values of a variable which divides the distribution into 4 equal parts

A

Quartiles: Qi

Quartile to Percentiles: Q1= P25

36
Q

What is Q3 in percentile?

A

P75 or 75th percentile

1 quartile = 25 percentile

37
Q

What is Q2 in decile?

A

D5 or 5th decile

38
Q

What is P60 in decile?

A

D6 or 6th decile

10 percentile = 1 decile

39
Q

What is P25 in quartile?

A

Q1 or 1st quartile

25 percentile = 1 quartile

40
Q

What is Q2 in percentile?

A

P50 or 50th percentile

1 quartile = 25 percentile

BIOEPI (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions