The purpose of this assignment is to develop and carry out an inferential statistics analysis plan and
write up the findings. There are two main parts to this assignment:
● Part A: Inferential Statistics Data Plan and Analysis
● Part B: Write-Up of Results
Part A: Prepare Data Plan, Analyze Data, and Complete Part A of the Assignment #3 Template
➢ Task 1: Select Variables.
Review the variables you used for assignments #1 and #2. Select your qualitative
socioeconomic variable as your grouping variable and the two expenditure variables from
the variables used in these previous assignments. In the Introduction, briefly describe the
variables selected and what type of information you expect this analysis will provide. Fill in
Table 1: Variables Selected for Analysis with name, description, and type of variable (i.e.,
qualitative or quantitative).
➢ Task 2: Select and Run a One Sample Confidence Interval Analysis
For one expenditure variable, select and run the appropriate method for estimating a
parameter, based on a statistic (i.e., confidence interval method). Complete Table 2:
Confidence Interval Information and Results, which follows the format outlined by Kozak
and the course’s problem-solving approach, including:
○ Random variable and parameter stated in words
○ Confidence interval method, including rationale and assumptions
○ Method used for analyzing data (i.e., web applets, Excel, TI calculator, etc.). Be specific
by including the name of the applet or the functions used for Excel or calculator.
○ Results obtained (including critical values and margin of error)
○ Conclusion and Interpretation
➢ Task 3: Select Two Sample Hypothesis Test
Using the second expenditure variable (with the socioeconomic variable as the grouping
variable), select and run the appropriate method for making decisions about two parameters
relative to observed statistics (i.e., two sample hypothesis test method). Complete Table 3:
Two Sample Hypothesis Test Analysis, which follows the format outlined by Kozak and the
course’s problem-solving approach, including:
○ Hypotheses (null and alternative)
○ Two sample hypothesis testing method, including rationale and assumptions
○ Method used for analyzing data (i.e., web applets, Excel, TI calculator, etc.). Be
specific by including the name of the applet or the functions used for Excel or calculator.
○ Results obtained
○ Conclusion (i.e., Reject the null hypothesis OR Fail to reject null hypothesis) and
Interpretation
Part B: Write Up Results (Complete Part B of the Assignment 3 Template)
For this 1 to 2-page section, refer to the inferential statistics data plan and computations done
for Part A of this assignment. You will also refer to your work from Assignment 2.
In the Results Write-Up, address the following areas:
➢ Introduction. Based on the scenario you submitted for the second assignment, provide a brief
description of scenario, including the variables that were used in the Inferential Statistics
analysis.
➢ Data Set Description and Method Used for Analysis. Briefly describe the data set, using
information provided with data set and write up in Assignment #2. Also summarize the
method(s) (i.e., free web applets, Excel, TI Calculator) you used to analyze the data.
➢ Results. In this section, you will report the results of your confidence interval and hypothesis
test
For the Confidence Interval Analysis, write one paragraph that includes:
o Statistical method used, including rationale and whether assumptions were met.
o Statistical Interpretation. The statistical interpretation is that the confidence interval has a
probability (1−α, where α is the complement of the confidence level) of containing the
population parameter.
o Real World Interpretation. Explain the results in everyday language. Recommend
reviewing the text and information from the classroom for examples on how to report
results in everyday language.
For the Two Sample Hypothesis Test Analysis, write one paragraph that includes:
o Hypotheses that were assessed. See below table for example format:
o Statistical method used, including rationale and whether assumptions were met. See
below table for example format:
o Results and conclusion. This is where you state whether to reject Ho or fail to reject Ho
including the test statistic and p-value that was obtai