math 399n week 6 ilab math399n week 6 ilab new 20222023 statistics for decision making chamberlain college of nursing
Written for
Nursing
All documents for this subject (40850)
Seller
Follow
chinks
Reviews received
Content preview
MATH 399N Statistics for Decision Making
Week 6 iLab
Name:
Statistical Concepts:
• Data Simulation
• Confidence Intervals
• Normal Probabilities
Short Answer Writing Assignment
All answers should be complete sentences.
We need to find the confidence interval for the SLEEP variable. To do this, we need to find the
mean and then find the maximum error. Then we can use a calculator to find the interval, (x – E,
x + E).
First, find the mean. Under that column, in cell E37, type =AVERAGE(E2:E36). Under that in
cell E38, type =STDEV(E2:E36). Now we can find the maximum error of the confidence interval.
To find the maximum error, we use the “confidence” formula. In cell E39, type
=CONFIDENCE.NORM(0.05,E38,35). The 0.05 is based on the confidence level of 95%, the
E38 is the standard deviation, and 35 is the number in our sample. You then need to calculate
the confidence interval by using a calculator to subtract the maximum error from the mean (x-E)
and add it to the mean (x+E).
1. Give and interpret the 95% confidence interval for the hours of sleep a student gets. (5
points)
One sample Z confidence interval:
μ : Mean of variable
Standard deviation not specified.
95% confidence interval results:
Variable n Sample Mean Std. Err. L. Limit U. Limit
Sleep 35 6.6857143 0.22741303 6.2399929 7.1314356
(6.24, 7.13)
Interpretation: It can be said with 95% certainty that the average hours the students sleep is
between 6.24 hours and 7.13 hours.
Then, you can go down to cell E40 and type =CONFIDENCE.NORM(0.01,E38,35) to find the
maximum error for a 99% confidence interval. Again, you would need to use a calculator to
subtract this and add this to the mean to find the actual confidence interval.
MATH399 Week 6 Lab Template/ page 1
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 chinks. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
