What do you understand by co-efficient of variation? Explain its usefulness in business?

The coefficient of variation represents the ratio of the standard deviation to the mean, and it is …

What are the properties of good measure of dispersion?

Since measures of dispersion are usually called as averages of the second order, they should posses…

Moving Average

In statistics, a moving average , also called rolling average , rolling mean or running average , …

Why standard deviation is considered to be the best measures?

Standard deviation   is a widely used measure of variability or diversity used in   statistics   an…

What are the different measures of dispersion?

A measure of statistical dispersion is a   real number   that is zero if all the data are identical…

Distinguish between Raw and Central Moments

Raw Moments: In mathematics, moment is, loosely speaking, a quantitative measure of the shape of …

Discuss the Limitations of Statistics

The following are the important limitations of the statistics: 1. Statistics does not deal with iso…

A t - test is any statistical hypothesis test in which the test statistic follows a Student's …

State the various ways of presenting a frequency distribution graphically and discuss one of them

A frequency distribution can be presented graphically in any of the following ways: 1.Histogram  2.…

Frequency Distribution/Table

In statistics, a frequency distribution is a tabulation of the values that one or more variables t…

Ogive

An ogive is the roundly tapered end of a two-dimensional or three-dimensional object. In ballistics…

Questionnaire

A questionnaire is a research instrument consisting of a series of questions and other prompts for…

Time Series in the Business

Time series is very usefull tool for business forecasting analysis.  That is why it is a matter of …

Trend

The term ‘trend’ or secular trend is very popularly used in day to day conversation. For example, w…

Explain different Components of a Time Series

It is customary to classify the fluctuations of a time series into four basic types of variations w…

Explain clearly how the measures of skewness and kurtosis can be used in describing a frequency distribution

Skewness: In probability theory and statistics, skewness is a measure of the asymmetry of the pro…

Arithmetic Mean/Median/Mode

Arithmetic: I n mathematics and statistics, the arithmetic mean (or simply the mean ) of a list o…

Distinguish Positive and Negative correlation

Positive correlation:   A positive correlation means that if one variable gets bigger, the other va…

Properties of Co-efficient of correlation

The correlation coefficient is symmetrical with respect to X and Y i.e.//r xy =r yx The correlatio…

Coefficient of Correlation

The coefficient of correlation measures the degree of relationship between two sets of figures. As …