MATH 221 Week 4 Homework: Statistics for Decision-Making (TOP GRADE A+)
3 views 0 purchase
Course
Math 221
Institution
Devry University
Question: The length of time a person takes to decide which shoes to purchase is normally … with a mean of 8.54 minutes and a standard deviation of 1.91. Find the probability that a randomly … ind ividual will take less than 5 minutes to select a shoe purchase. Is this outcome unusual? Question...
question the length of time a person takes to decide which shoes to purchase is normally … with a mean of 854 minutes and a standard deviation of 191 find the probability that a randomly … individ
Written for
Devry University
Math 221
All documents for this subject (141)
Seller
Follow
ProfGoodlucK
Reviews received
Content preview
MATH 221 Week 4 Homework: Statistics for Decision-Making
WEEK 4 Homework
Score for this attempt: 38 out of 40
Submitted Mar 31 at 1:32pm
This attempt took 29 minutes.
Move To...
Question 1
pts
The length of tim e a person take
The length of time a person takes to decide which shoes to purchase is normally
distributed with a mean of 8.21 minutes and a standard deviation of 1.90. Find the
probability that a randomly selected individual will take less than 6 minutes to select a
shoe purchase. Is this outcome unusual?
Probability is 0.12, which is unusual as it is less than 5%
Probability is 0
Correct!
Probability is 0.12, which is usual as it is not less than 5%
Probability is 0
Probability is 0.88, which is usual as it is greater than 5%
Probability is 0
Probability is 0.88, which is unusual as it is greater than 5%
Probability is 0
Move To...
Question 2
pts
Monthly water bills for a city ha v
Monthly water bills for a city have a mean of $108.43 and a standard deviation of
$32.09. Find the probability that a randomly selected bill will have an amount greater
, than $165, which the city believes might indicate that someone is wasting water. Would
a bill that size be considered unusual?
Probability is 0.96, which is usual as it is greater than 5%
Probability is 0
Probability is 0.96, which is unusual as it is greater than 5%
Probability is 0
Correct!
Probability is 0.04, which is unusual as it is less than 5%
Probability is 0
Probability is 0.04, which is usual as it is less than 5%
Probability is 0
Move To...
Question 3
pts
In a health club, research show s
In a health club, research shows that on average, patrons spend an average of 42.5
minutes on the treadmill, with a standard deviation of 4.8 minutes. It is assumed that
this is a normally distributed variable. Find the probability that randomly selected
individual would spent between 35 and 48 minutes on the treadmill.
Correct!
0.81
0.81
0.19
0.19
-0.19
-0.19
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 ProfGoodlucK. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
