Question

Consider taking a multiple choice exam with 25 questions and 5 possible answers per question. Assuming you randomly guess, let Y = number of questions out of the 25 you get right.

a. What is the distribution TYPE for Y? Be sure to
give values for its parameters.

b. Give the functional form of the pmf for Y.

c. In tabular form, write out the pmf of Y.

d. Give the histogram for the pmf of Y.

e. Find the mean of Y.

f. Find the standard deviation of Y.

Answer #1

Consider taking a multiple choice exam with 25
questions and 5 possible answers per question. Assuming you
randomly guess, let Y = number of questions out of the 25 you get
wrong.
a. What is the distribution TYPE for Y? Be sure to
give values for its parameters.
b. Give the functional form of the pmf for Y.
c. In tabular form, write out the pmf of Y.
d. Give the histogram for the pmf of Y.
e. Find the...

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(ii) defining the random variable,
(iii) calculate the exact probabilities that you pass the test
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Using the CDF command in MINITAB, answer the following
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0-0.1
0.1-0.2
0.2-0.3
0.3-0.4
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On a Multiple Choice test, each question has six possible
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Give your answer in the box above as a whole
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(a) If you randomly guess on a single question, what is the
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A
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