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You have now finished the exam.

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Define the following statistical terms.

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What is population?

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[[0]]

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The set of things that we collect data from which can be a group of people or a set of events

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representative data fom a group of people

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a variable that describes data

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What is a sample?

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[[0]]

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A collection of data samples

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a set of data collected from a population by a specifc procedure

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A variable that represents the entire population

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Find the appropriate measures for the following data sample.

To find the mean of a set numbers, add all the numbers together and divide by how many values there are.

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The midpoint of a data set is the first value and the last value divided by each other.

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Find the mean.

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{x1},{x2},{x3},{x4},{x5},{x6}, {x7},{x8},{x9},{x10}

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Find the midpoint

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Find the Variance

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Find the standard deviation.

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The variance is defined by the following formula:

\n

Sum of x^2/no. of data points - (mean)^2

\n

The standard deviation is the square root of the variance.

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Find the variance and standard deviation of the following data set.

\n

{x1},{x2},{x3},{x4},{x5},{x6}, {x7},{x8},{x9},{x10}, {x11}, {x12}

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Well done! You have scored atleast 70%. The main advice I can give you is to keep revising and concentrate on your own areas of weakness where you deem fit!

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Welcome to the Statistics Exam. Here you will be answering different types of questions that cover this broad topic. Please do these questions on your own in silence. Good Luck!

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These questions are designed to give students on questions to do with statistics. They are basic but gives a small understanding on mean, variance and standard deviation. There are also some definitions.

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