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The Higher Education Research Institute at UCLA collected data from 203,967 incoming first-time, full-time freshmen from 270 four-year colleges and universities in the U.S. 62.6%

The Higher Education Research Institute at UCLA collected data from 203,967 incoming first-time, full-time freshmen from 270 four-year colleges and universities in the U.S. 62.6% of those students replied that, yes, they believe that same-sex couples should have the right to legal marital status. Suppose that you randomly pick eight first-time, full-time freshmen from the survey. You are interested in the number that believes that same sex-couples should have the right to legal marital status. Let the random variable X= the number that reply "yes", XB(8,0.626) .

(a) Construct the probability distribution function (PDF).

Round your answers to four decimal places.

xx

P(x)

0

1

2

3

4

5

6

7

8

(b) On average ( ), how many would you expect to answer yes?

Round your answer to two decimal places.

=

(c) What is the standard deviation ( )?

Round your answer to two decimal places.

=

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