QUESTION 1
·
1/1 POINTS
Which of the following tables shows a valid probability density function? Select all
correct answers.
That is correct!
•
x P(X=x)
0 0.37
1 0.06
2 0.01
3 0.56
•
•
x P(X=x)
0 38
1 38
2 14
•
•
x P(X=x)
0 25
1 310
2 310
3 310
•
,•
x P(X=x)
0 18
1 18
2 18
3 38
4 14
•
•
x P(X=x)
0 0.03
1 0.01
2 0.61
3 0.31
4 0.21
•
•
x P(X=x)
0 110
1 310
2 45
3 −15
•
Answer Explanation
Correct answer:
x P(X=x)
0 0.37
, 1 0.06
2 0.01
3 0.56
x P(X=x)
0 38
1 38
2 14
x P(X=x)
0 18
1 18
2 18
3 38
4 14
Remember that a valid probability density function has all of its probabilities
between 0 and 1, inclusive, and the sum of the probabilities equal 1.
FEEDBACK
•
•
•
•
Content attribution- Opens a dialog
QUESTION 2
·
1/1 POINTS
On average, Colby has noticed that 21 trains pass by his house daily (24 hours) on the
nearby train tracks. What is the probability that at most 6 trains will pass his house in
a 12-hour time period? (Round your answer to three decimal places.)
That is correct!
$$.102
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller HIGHSCORE. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.49. You're not tied to anything after your purchase.