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University of Maryland University College
STAT200  Assignment #1: Descriptive Statistics Data Analysis Plan
Identifying Information
Student (Full Name):
Class: STAT 200
Instructor: Dr. D.
Date: 10/11/18
Scenario:
I’m a 40 year old single working parent with 3 children. I’m looking to balance my family’s budget expenditure on meat and fruits. I hope to do so by analyzing trends in other households.
Table 1. Variables Selected for the Analysis
Variable Name in the Data Set 
Description (See the data dictionary for describing the variables.) 
Type of Variable (Qualitative or Quantitative) 
Variable 1: “SEIncome” 
Annual household income in USD. 
Quantitative 
Variable 2: “SEMarital Status” 
Marital Status of Head of Household 
Qualitative 
Variable 3:”SEAgeHeadHousehold” 
Age of the Head of Household (in years) 
Quantitative 
Variable 4:”USDMeat” 
Annual Expenditure on Meat (in USD) 
Quantitative 
Variable 5:”USDFruits” 
Annual Expenditure on Fruits (in USD) 
Quantitative 
Reason(s) for Selecting the Variables and Expected Outcome(s):
 Variable 1: “SEIncome” – Budget expenditure obviously depends on household income. Budget is expected to increase as household income increases.
 Variable 2: “SEMarital Status “– Marital status not only changes family size but also affects expenditure planning. Single parents are expected to be more economical.
 Variable 3: “SEAge Head Household “ Age of head of household relates to budgeting prudence. Young head of households might be spending more.
 Variable 4: “USDMeat“ It’s required for analyzing trends in other households. I expect younger and married head of households to spend more on meat.
 Variable 5: “USDFruits“ Needed for analysis of trends. I expect older and single head of household to spend more on fruits.
Data Set Description:
Proposed Data Analysis:
Measures of Central Tendency and Dispersion
Table 2. Numerical Summaries of the Selected Variables
Variable Name 
Measures of Central Tendency and Dispersion 
Rationale for Why Appropriate 
Variable 1: “Income” 

I am using median for two reasons:
I am using sample standard deviation for three reasons:

Variable 2: “SEMarital Status” 

Mode is used because variable is qualitative. Mean and median can’t be calculated. 
Variable 3: SEAge Head Household 

Mean is used because
Sample standard deviation is used because

Variable 4: USDMeat 

Median is used because
Sample standard deviation is used because

Variable 5: USDFruits 

Median is used because
Sample standard deviation is used because

Graphs and/or Tables
Table 3. Type of Graphs and/or Tables for Selected Variables
Variable Name 
Graph and/or Table 
Rationale for why Appropriate? 
Variable 1: “Income” 
Graph: I will use the histogram to show the normal distribution of data. 
Histogram is one of the best plot to show the normal distribution of quantitative level data. 
Variable 2: SEMarital Status 
Graph: I’ll use a pie chart. 
Pie chart is good for showing the proportional distribution of qualitative data. 
Variable 3: SEAge Head Household 
Graph: I will use the histogram. 
Histogram would show the normal distribution of quantitative data. 
Variable 4: USDMeat 
Graph: I will use the Box Plot. 
Box plot doesn’t presume normal/any other distribution of data. It’s good for data expected to have outliers. 
Variable 5: USDFruits 
Graph: I will use the Box Plot. 
Box plot doesn’t presume normal/any other distribution of data. It’s good for data expected to have outliers. 
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