NOTE:

Please solve those questions by yourself. So, DON'T copies the answers from Course Hero files.

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Question 1).

You are interested in the number of English-speaking people on the planet who want to play a new kind of online video game.

You asked 300 college students if they were interested in playing video games, 100 said yes, and of them 20 preferred your game to an existing game that is widely used.

How many people were in the sample?

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Question 2).

What is the mean of x?

x

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Question 3).

Using the value of x from the prior question, what is the standard

deviation of x?

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Question 4).

There was a very short quiz with five questions. The following table shows the number of correct answers and the cumulative relative frequency for those scores in the class.

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