Admin

The expected value of a random variable is the average value of a variable that we expect to get if the experiment was conducted a large number of times. For example, if we were...

A t score is a test statistic that is used in the testing of equality of sample means in one or two samples (of small sizes). Suppose you are given the value of a...

Statistical variables come in four types- Nominal, Ordinal, Interval and Ratio. Qualitative or categorical data are usually measured using the nominal or ordinal scales. On the other hand we use the Interval and Ratio...

The relative frequency distribution is a grouped frequency distribution table that also shows the relative frequencies. The relative frequencies are quantities that tell us what proportion of the total number of values lie within...

The five-number summary for a given set of data is a set of 5 representative numerical values obtained from the data which gives us an idea of how the data looks like and how...

The f test is a statistical test used to check for the equality of variance of two samples. It uses the F distribution to calculate the critical value. We also use the F test...

Degrees of freedom in statistics mean the number of independent values that can be varied without changing a given parameter value. Let us understand this by means of an example. Suppose you are given 5...

A point estimate is a single numerical value obtained using a sample from the entire population that is used to approximate a parameter. The numerical value which is obtained using the sample values is...