Statistics Fundamentals Final Milestone with CORRECT ANSWERS
4 views 0 purchase
Module
MAT 300
Institution
Strayer University
Statistics Fundamentals Final Milestone with CORRECT ANSWERS.You passed this Milestone
22 questions were answered correctly.
3 questions were answered incorrectly.
1
Which of these random samples represents a representative sample
of the systolic blood pressure of all patients in a hospital?
...
which of these random samples represents a represe
rachel recorded the number of calls she made at wo
statistics fundamentals final milestone
Written for
Strayer University
MAT 300
All documents for this subject (18)
Seller
Follow
StudyConnect
Reviews received
Content preview
Statistics Fundamentals Final Milestone
You passed this Milestone
22 questions were answered correctly.
3 questions were answered incorrectly.
1
Which of these random samples represents a representative sample
of the systolic blood pressure of all patients in a hospital?
The systolic blood pressure of 50 children admitted in the hospital.
The systolic blood pressure of 50 patients in the hospital.
The systolic blood pressure of 50 employees in the hospital.
The systolic blood pressure of 50 patients in the neurology department.
RATIONALE
For a sample to be representative it needs to look like the entire set of interest. To look
like all patients in the hospital, they should be randomly sampled from the entire
population not simply the neurology department or children. Employees are not a part
of the population of interest.
CONCEPT
Random & Probability Sampling
2
Rachel recorded the number of calls she made at work during the week:
Day Calls
Monday 18
Tuesday 14
Wednesday 24
Thursday 16
She expected to make 18 calls each day. To answer whether the number of
calls follows a uniform distribution, a chi-square test for goodness of fit
should be performed. (alpha = 0.10)
, What is the chi-squared test statistic? Answers are rounded to the
nearest hundredth.
3.11
1.52
4.61
3.27
RATIONALE
Using the chi-square formula we can note the test statistic is
CONCEPT
Chi-Square Test for Goodness-of-Fit
3
A poll conducted a week before the school election to the student council
showed that Janice would win with 63% of the vote. The margin of error was
14%.
If Janice needs to receive at least half the votes to win the election,
can we be confident of Janice's victory?
Yes, because the poll stated that she will win with 63% of the vote.
No, because she could receive as low as 49% of the vote.
No, because she could receive as low as 14% of the vote.
Yes, because she could receive as much as 77% of the vote.
RATIONALE
Recall for a confidence interval, we take the point estimate +/- margin of error. Using
this framework we take the point estimate of 63%, then add and subtract the margin of
error, 14%.
, This gives us a CI of 49% to 77%.
Given that you need to have at least 50% of the vote and we are confident that 49% is
possible given our CI, we are not confident that Janice will win.
CONCEPT
Margin of Error
4
There is a 30% chance of rain tomorrow.
What are the odds in favor of it raining?
3:7
3:10
10:3
7:3
RATIONALE
Recall that we if we have a probability " ", we can formally express odds as " ".
So if the probability is 30%, or 30/100 in fraction form, then we can express odds as:
CONCEPT
Odds
5
This scatterplot shows the performance of an electric motor using the
variables speed of rotation and voltage.
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 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 StudyConnect. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £12.25. You're not tied to anything after your purchase.
