Lean Six Sigma Training

Question 1

refers to the central or typical value around
which data points tend to cluster.

Answer 1

central tendency

Question 2

Central Tendency refers to the
central or typical value around
which data points tend to
cluster. Usually called as __________

Answer 2

averages

Question 3

what are the measures of central tendency?

Answer 3

mean, median, mode

Question 4

this measure of CT sums all the values in the data-set and divides it by the total number of values

Answer 4

mean

Question 5

this measure of CT uses the most common value

Answer 5

mode

Question 5

this measure of CT arranges in order all the values (highest ->lowest) and picks the middle value

Answer 5

median

Question 5

data set = 1,2,3,4,5
(1+2+3+4+5)/5 is an example of which measure of CT?

Answer 5

Mean

Question 6

data set =2,3,4,5,3,6
= 3

is an example of which measure of CT?

Answer 6

3

Question 6

data set = 5,2,1,4,3,3
= 5,4,3,3,2,1
= (3+3)/2

is an example of which measure of CT?

Answer 6

Median

Question 6

Arithmetic Mean (or, simply, “mean”) is ________

Answer 6

nothing but the average

Question 7

is calculated when certain values
in a data set are more important than the others.

Answer 7

weighted mean

Question 7

an appropriate measure when
values change exponentially

Answer 7

geometric mean

Question 7

when is harmonic mean appropriate to be used?

Answer 7

in situations where the reciprocals of values ar more useful

Question 7

what does the central limit theorem state?

Answer 7

regardless of the shape of the population
distribution, the sampling distribution of
the sample mean will approach a normal
distribution as the sample size increases.

Question 7

Samples are selected randomly
from the population to ensure that they are
representative

Answer 7

random sampling

Question 8

what does independence mean?

Answer 8

the selection of one sample does
not influence the selection of another.

Question 9

when is sample size sufficiently large?

Answer 9

n ≥ 30

Question 10

what is data variation?

Answer 10

the differences or dispersion observed among individual data points in a dataset.

Question 11

why is understanding variation important?

Answer 11

Understanding variation is essential
for making informed decisions,
drawing conclusions, and making
predictions based on data

Question 12

three types of data variation

Answer 12

within-group

between-group

total

Question 13

a Variation observed between
different groups or samples in a
dataset

Answer 13

between-group variation

Question 14

a Variation observed within
individual groups or samples in a
dataset

Answer 14

within-group variation

Question 15

what are the measures of data variation?

Answer 15

range
variance
standard deviation
interquartile range

Question 16

What is range?

Answer 16

DIFFERENCE BETWEEN MAX AND MIN VALUES in a data set

Question 17

a measurement of how far each number in a data set is from the mean/average and thus from every other number in the set

Answer 17

variance

Question 18

A statistic that measures the dispersion of a data set relative to its mean and is calculated as the square root of the variance

Answer 18

standard deviation

Question 19

The range between the first and third quartiles of a dataset which describes the middle 50% of the data.

Answer 19

Interquartile Range

Question 20

ways to visualize data variation

Answer 20

box plot

histogram

scatter plot

Question 21

they represent the distribution and variation of data

Answer 21

box plots

Question 22

____________________ show the frequency distribution and variation of data across
different bins or intervals

Answer 22

histogram

Question 23

_____________ visualize the relationship between variables and the spread of data points

Answer 23

scatter plots

Question 24

what is variation?

Answer 24

refers to the differences
or fluctuations that occur in
processes, outputs, or outcomes
over time