Stat-312: Quiz #03
Name:
Key
1.
A vending machine accepts nickels, dimes, and quarters, and rejects any objects that it does not recognize
as one of these coins.
Unfortunately, the machine also randomly rejects valid coins.
The probability
distribution for the number of times the machine rejects a valid coin is given in the table.
k
P(X=k)
(a)
What is the chance that the machine will reject a valid coin more than three times before
the coin is accepted?
(b)
Calculate the mean and standard deviation for the distribution.
(c)
Draw the distribution in the space below.
Draw the locations of the mean and standard deviation of the
distribution in the distribution drawing.
2.
On a multiple choice exam, there are five questions, and each question has four choices (only one of which
is correct).
Suppose that a
really bad
student comes to class without doing the homework or reading the text;

##### We have textbook solutions for you!

**The document you are viewing contains questions related to this textbook.**

**The document you are viewing contains questions related to this textbook.**

Expert Verified