Scenario/Summary. (PROJECT PART 1)
You will complete a Course Project in this course that will span two weeks. The final project is due the Sunday
of Week 7. The project is broken into two parts. You will complete Part I in Week 6 and Part II in Week 7. In
Week 6, Confidence Intervals will be explored and in Week 7 Hypothesis testing will be explored.
A confidence interval is a defined range of values such that there is a specified probability that the value of a
parameter lies within the interval.
In Part I of this project, you will pick a topic, complete research and provide a write-up that includes
calculations. Round all values to two decimal places when appropriate.
Deliverables
Choose a Topic where you can gather at least 50 pieces of data.
The Golden Gate Warriors Points Per Game in 2016 (use the points scored in the first 50 games).
High School Graduation Rates by State (use the graduation rates for all 50 states)
Average Tuition Rates in the US (You have to find the tuition rates of 50 college/universities).
The prices of a hotel room per night in a major city (You have to find the price of the same night of hotels in one
city).
Weights of 50 babies at birth.
Write at least a 1-Page Report
Open a Word Document
Introduction–Provide a description of your topic and cite where you found your data.
Sample Data—Include a 5×10 table including your 50 values in your report. You must provide ALL of your
sample data.
Problem Computations—For the topic you chose, you must answer the following:
Determine the mean and standard deviation of your sample.
Find the 80%, 95%, and 99% confidence intervals.
Make sure to list the margin of error for the 80%, 95%, and 99% confidence interval.
Create your own confidence interval (you cannot use 80%, 95%, and 99%) and make sure to show your work.
Make sure to list the margin of error.
Problem Analysis—Write a half-page reflection.
What trend do you see takes place to the confidence interval as the confidence level rises? Explain
mathematically why that takes place.
Provide a sentence for each confidence interval created in part c) which explains what the confidence interval
means in context of topic of your project.
Explain how Part I of the project has helped you understand confidence intervals better?
How did this project help you understand statistics better?
(PROJECT PART 2)
Hypothesis Testing is the use of statistics to determine the probability that a given claim is true.
In Part II of this project, you will choose a data set, review claims and perform hypothesis testing and make a
decision. You will then complete a write-up that includes the calculations.
The government logs the number of documented births, deaths, marriages and divorces however it is possible
to have undocumented cases. In part II of this project, you are going to test claims about total births, deaths,
marriages and divorces.
Choose a Data Set.
Go to https://www.cdc.gov/nchs/products/nvsr.htm (Links to an external site.)
In the search bar type: Births, Marriages, Divorces, and Deaths
screenshot of CDC website toolbar
Pick a DataSet and download the PDF document and make note of the volume, number, and date. For
example,
screenshot of National Vital Statistics Reports webpage
Pick the same month/year combination for each data set. For example, choosing September of 2009.
screenshot of example dataset
Preliminary Calculations
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Create a summary table for 1. Live Births, 2. Deaths, 3. Marriages, and 4. Divorces highlighting the mean,
median, sample/population standard deviation, n = number of states that submitted data for each the data sets.
You will have FOUR tables using the list of values of each state, the District of Columbia and Puerto Rico (You
could have 52 numbers for each data set. You may have less data numbers if not all states/territories
submitted data values.)
Summary Table for _
Mean
Median
Standard Deviation
n (Number of States who submitted Data)
Hypothesis Testing
With the information that you gather from the summary tables, test the following (you can use excel when
appropriate):
Determine if there is sufficient evidence to conclude the average amount of births is over 5000 in the United
States and territories at the 0.05 level of significance.
Determine if there is sufficient evidence to conclude the average amount of deaths is equal to 6000 in the
United States and territories at the 0.10 level of significance.
Determine if there is sufficient evidence to conclude the average amount of marriages is greater or equal to
2500 in the United States and territories at the .05 level of significance.
Determine if there is sufficient evidence to conclude the average amount of divorces is less than or equal to
4000 in the United States and territories at the 0.10 level of significance.
For each of the tests above, in your report, be sure to—
Clearly state a null and alternative hypothesis
Give the value of the test statistic
Report the P-Value
Clearly state your conclusion (Reject the Null or Fail to Reject the Null)
Explain what your conclusion means in context of the data.
- Make your OWN Claim (You are completing ONE more Hypothesis Test)
Lastly, propose and conduct your own test of hypothesis.
a) Pick one data set: Births, Deaths, Marriages OR Divorces.
b) Write a claim about the data set.
c) For your claim—
Clearly state a null and alternative hypothesis
Give the value of the test statistic
Report the P-Value
Clearly state your conclusion (Reject the Null or Fail to Reject the Null)
Explain what your conclusion means in context of the data.