Exam (elaborations)
Stats Final Exam Questions And Answers With Complete Solutions
- Course
- Institution
Stats Final Exam Questions And Answers With Complete Solutions
[Show more]
Content preview
Stats Final Exam Questions And AnswersWith Complete Solutions
Suppose the mean salary for a first year nurse is symmetric and
unimodal, with mean $42,000 and standard deviation $3,500.
a. What range would you expect to find 95% of first year
nursing salaries? Correct Answers mean +/- 2(standard
hh hh
deviation)
Empirical Rule (68-95-99.7) Rule Correct Answers 68 between
hh hh
-1 and 1
95 between -2 and 2
99.7 between -3 and 3
Suppose the mean salary for a first year nurse is symmetric and
unimodal, with mean $42,000 and standard deviation $3,500.
c. What percent of first year nursing salaries would you expect
to be above $52,500? Correct Answers $52,500=mean+3
hh hh
standard deviations
. Identify the area under the standard normal curve that falls in
each of the following regions.
a. Between z = 0 and z = 1.95.
b. Between z = -1.53 and z = 1.04.
c. To the right of z = 2.32.
d. To the left of z = -1.23. Correct Answers Use ncdf
hh hh
, If there is no lower bound or upper bound Correct Answers no
hh hh
lower bound use: -1e^99
no upper bound use: 1e^99
Find the value(s) of z from the standard normal distribution such
that:
a. 0.0212 of the area under the curve lies to the left of z.
b. 0.08 of the area under the curve lies to the right of z.
c. 0.762 of the area under the curve lies between these two z
values. Correct Answers Use Inv. Norm
hh hh
When given the area use Correct Answers Inv. Norm
hh hh
When given the z-score use Correct Answers ncdf
hh hh
To find the z-score you use what equation? Correct Answers x-
hh hh
mean/standard deviation
Ross is taking Professor Polaris' Astronomy 120 class at JCCC
and Rachel is taking Professor Andromeda's Astronomy 120
class at JCCC. Ross scored a 78 on the second unit exam in his
Astronomy course, and the class average was 73.8 with a
standard deviation of 8.28. Rachel scored a 79 on the second
unit exam in her Astronomy course, and her class average was
74.6 with a standard deviation of 8.89. Assuming that both
classes had approximately normally distributed exam scores,
who scored relatively better on this exam, Ross or Rachel?
Correct Answers Find z-score for both and compare
hh hh
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 Classroom. 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.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82191 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now