A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 70 and a standard deviation of 10.How many different samples of size 5 can be taken from a finite population of size 10?

Respuesta :

252 different samples can be taken.

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The order in which the people are chosen is not important, which means that the combinations formula is used to solve this question.

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Combinations formula:

[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

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In this question, samples of 5 from a set of 10, so:

[tex]C_{10,5} = \frac{10!}{5!5!} = 252[/tex]

252 different samples can be taken.

A similar question is given at https://brainly.com/question/24278448