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"Education is the most powerful weapon which you can use to change the world”
– Nelson Mandela

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The age-old infrastructure has led Houston‘s water system in a completely maligned state. The red alert is imposed on every Houstonians on their consumption of daily drinking water. What are the reaso...

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The age-old infrastructure has led Houston‘s wat

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An academic integrity is very important thing for the student because through this he or she builds up their trust towards professors and also their future employers. Also, they are able to understand...

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A contract is an agreement between the two parties that decide to have a pact of giving and taking. Both mutually comes and decides to make and joint agreement. Each party is bound by the contract to...

Week 2 Discussion Topic 1
Week 2 Discussion Topic 1

A contract is an agreement between the two parties

Why "T"

Why "T"

Q The t-distribution was introduced in Chapter 5 but a more detailed explanation of the distribution is given in this section. Explain in your own words why we use the t distribution rather than the z distribution (normal distribution) when computing statistical tests on the mean?

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Like a standard normal distribution (or z-distribution), the t-distribution has a mean of zero. ... The t-distribution is most useful for small sample sizes, when the population standard deviation is not known, or both. As the sample size increases, the t-distribution becomes more similar to a normal distribution.