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STAT200 Introduction to Statistics Assignment #3: Inferential Statistics Analysis and Writeup
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:
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:
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.
STAT200: Assignment #3 – Inferential Statistics Analysis and Writeup – Instructions Page 2 of 5
For the Two Sample Hypothesis Test Analysis, write one paragraph that includes: o Hypotheses that were assessed. See below table for example format:
Examples Format for Writing Null and Alternative Hypotheses, in Words
Null Hypothesis: There is no significant difference in [insert variable name] between [insert group 1 name] and [insert group 2 name] households.
➢ For two-tailed (≠): There is a significant difference in [insert variable name] between [insert group 1 name] and [insert group 2 name] households.
➢ For one-tailed (>): [Insert group 1 name] has statistically significantly higher [insert variable name] than [insert group 2 name].
➢ For one-tailed (<): [Insert group 1 name] has statistically significantly lower [insert variable name] than [insert group 2 name].
o Statistical method used, including rationale and whether assumptions were met. See below table for example format:
Example Format for Writing Statistical Method with Rationale
To determine whether the there was a difference in [insert household expenditure] between [insert names of two groups), a [insert name of hypothesis test used] was used. It was the appropriate statistical method, because [insert rationale]. The assumptions were assessed [insert information about the assumptions assessed and whether they were met].
o Conclusion from the Results. This is where you state whether to reject Ho or fail to reject Ho including the p-value that was obtained. The rule is: if the p-value < α, then reject Ho. If the p-value ≥α, then fail to reject Ho.
STAT200: Assignment #3 – Inferential Statistics Analysis and Writeup – Instructions Page 3 of 5
o Real World Interpretation. Explain, in everyday language, the results. If any of the assumptions were not met, describe how it might affect conclusions. Address issues of Type I and/or Type II Error, where appropriate. Recommend reviewing the text and information from the classroom for examples on how to report results in everyday language.
➢ Discussion– Write one paragraph that summarizes the results of your findings and how they may be helpful to the person described in the scenario, when making a household budget.
Assignment Submission: Name the file that contains your completed Assignment #3 Inferential Statistics Analysis – Template using the following format: “Assignment3-StudentLastName.” Submit it via the Assignments area in the LEO classroom in the “Assignment #3: Inferential Statistics Analysis and Writeup” folder.
Grading Rubric for Assignment #3
Part A: Prepare Data Plan, Analyze Data, and Complete Part A of the Template
Selection of variables and completion of table 10%
Selection and Calculation of Confidence Interval Analysis: 20% ● Selection of Appropriate Test and Rationale
● Method Used and Calculation
● Statistical Interpretation
Selection and Calculation of Two Sample Hypothesis Test: 20% ● Research Question and Hypotheses
● Selection of Appropriate Test and Rationale
● Method Used and Calculation ● Conclusion, including p-value ● Statistical Interpretation
Part B: Write Up of Results
Introduction and Description of Data Set 5%
STAT200: Assignment #3 – Inferential Statistics Analysis and Writeup – Instructions Page 4 of 5
Confidence Interval. Summarized: 15%
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