prefinal

Question 1

refers to a distortion or asymmetry that deviates from the symmetrical bell curve, or normal distribution. A normal distribution has a skewness equal to one. Zero indicates perfect symmetry.

Answer 1

Skewness

Question 2

mode < median < mean.

Answer 2

positive skew

Question 3

mean < median < mode.

Answer 3

negative skew

Question 4

indicates that the tail of the distribution is more stretched on the side above the mean.

Answer 4

positive skew

Question 5

ndicates that the tail of the distribution is more stretched on the side below the mean.

Answer 5

negative skew

Question 6

is a measure of flatness of the distribution. A measure to which a frequency distribution is concentrated about its mean.

Answer 6

kurtosis

Question 7

Types of Kurtosis:

Answer 7

leptokurtic
mesokurtic
platykurtic

Question 8

A distribution that is more peaked than the normal distribution. The higher peak results from the clustering of data points along the X-axis. The tails are also fatter than those of a normal distribution. The coefficient of kurtosis is usually found to be more than 0.
- Small range with very peak mode.

Answer 8

leptokurtic

Question 9

Bell shape with gradual slopecurve is equal to the 3.

Answer 9

mesokurtic

Question 10

is less than 0.

Answer 10

platykurtic

Question 11

refers to any activity which generates outcomes.

Answer 11

Experiment

Question 12

a set of possible outcomes or results of that experiment. It could either be discrete or continuous sample space.

Answer 12

Sample space

Question 13

contains finite or countable number of sample points.

Answer 13

Discrete sample space-

Question 14

Consist of a set of real numbers that contains at least one interval.

Answer 14

Continuous sample space-

Question 15

refers to a subset of a sample space and it is usually denoted by capital letter. It may be either simple or compound.

Answer 15

Event

Question 16

event containing only one outcome on the sample space.

Answer 16

Simple event

Question 17

refers to the event that may be expressed as union of two simple events.

Answer 17

Compound event-

Question 18

is an event consisting of all outcomes of the sample space.

Answer 18

Sure event-

Question 19

is an event which contains no outcome of the sample space.

Answer 19

Impossible event-

Question 20

very useful pictorial representation in dealing with relationships and operations involving events.
Proper subset of two events, intersection of two events, union of two events, complement of an event, mutually exclusive event.

Answer 20

Venn Diagram

Question 21

Refers to a method of finding total sample points in a sample space by listing it systematically.
When attempting to determine the possible outcome from the experiment, it is often helpful to draw a diagram.

Answer 21

Tree Diagram

Question 22

very useful in writing formulae in permutation and combinations.
“ It is denoted by the symbol n!

Answer 22

Factoral Notation

Question 23

Refers to an arrangement or ordering of all or parts of a set of objects

Answer 23

Permutation