Descriptive Statistics II

Question 1

Multiple data sets from data independent data sources

Answer 1

Boxplot/Box-whisker plot

Question 2

It can tell if your data is symmetrical, how tightly grouped, and how it is skewed

Answer 2

Boxplot/Box-Whisker Plot

Question 3

Five values needed for boxplot

Answer 3

LV, HV, Q1, Q2 (median), Q3

Question 4

measurements obtained by using data values from SAMPLES

Answer 4

Statistics

Question 5

measurements obtained by using all data values from POPULATION

Answer 5

PARAMETER

Question 6

measures of central tendency

Answer 6

mean, median, mode, midrange

Question 7

the arithmetic average and is the sum of all divided by the total number of values

Answer 7

mean

Question 8

it is the middle point in data set that has been ordered; it is the halfway point

Answer 8

median

Question 9

it can be used for open-ended distribution

Answer 9

median

Question 10

most frequent data value and has three types

Answer 10

mode

Question 11

three types of mode

Answer 11

unimodal, bimodal, multimodal

Question 12

rough estimate of the middle and can be affected by 1 extremely high/low value

Answer 12

midrange

Question 13

mean of data set in which not all values are equally represented

Answer 13

weighted mean

Question 14

considers an additional “factor”, “weight”, “meaning”

Answer 14

weighted mean

Question 15

if the mean is greater than the median then it is

Answer 15

positively skewed

Question 16

if the mean is less than the median then it is

Answer 16

negatively skewed

Question 17

it tells about the measure of dispersion

Answer 17

kurtosis

Question 18

three types of kurtosis

Answer 18

flat (platykuric), highly peak (leptokurtic), bell-shaped (mesokurtic)

Question 19

measures of variation

Answer 19

variance, standard deviation, range, coefficient of variation

Question 20

simplest of the the measurement of variation

Answer 20

range

Question 21

it is the distance between HV and LV

Answer 21

range

Question 22

it is the average of the distance from each data point in a particular population to the MEAN

Answer 22

variance

Question 23

values are squared to eliminate negative signs

Answer 23

variance

Question 24

it measures the spread of population data

Answer 24

population variance

Question 25

measures the spread of sample data

Answer 25

sample variance

Question 26

it is the squareroot of the variance

Answer 26

standard deviation

Question 27

indicates the extent of deviation for a group as a whole

Answer 27

standard deviation

Question 28

allows comparison of SD when the units are different

Answer 28

Coefficient of Variation

Question 29

result is expressed in percentage

Answer 29

CVar

Question 30

measures of position

Answer 30

standard score/z score, percentile, decile, quartile, interquartile

Question 31

number of standard deviations that a data value is above or below the mean

Answer 31

z score

Question 32

it can standardized raw data from 2 or more samples

Answer 32

z score

Question 33

if z score is positive then it is

Answer 33

above mean

Question 34

if z score is zero then it is

Answer 34

the same as mean

Question 35

if z score is negative then it is

Answer 35

lower than mean

Question 36

it is used in EDUCATIONAL and HEALTH-RELATED field to indicate position of an individual in a group

Answer 36

Percentile

Question 37

can be used as rough measurement of variability in exploratory data analysis

Answer 37

interquartile

Question 38

it is the difference between Q1 and Q3

Answer 38

interquartile

Question 39

range of middle 50% of the data and is sued to identify outliers

Answer 39

interquartile