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Owner: emontes513
Created: Jul 16, 2013
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Inferential Statistics Report part 4
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Introduction Part 1:

When thinking of an idea for our group survey, I thought diet and exercise would be a good topic.  There's a lot of Americans who struggle with exercising for various reasons and also a lot of Americans who struggle with weight.  We collected responses via social media such as Facebook, Twitter, emailing, phone calls, and face to face interviews.  We surveyed individuals between 20 to 60 years old, males and females, and of various professions.  The sampling method was a convenience sampling, because the results were easy to find.  For example if Bob Jones did not want to answer then we would move forward and ask somebody else.  We asked the following questions: 

1) How many days a week do you exercise?

2) How many soft drinks do you drink per week?

3) In the past six months, have you lost weight?

4) Of these healthy diet choices, which one do you have difficulty including in your diet?

a) Vegetables b) Fruits  c) Whole Grains  d) Lean meats (protein)  e) Dairy

 

Part 2:

The question I will focus on is #2) How many soft drinks do you drink per week?

a)

Result 1: Pie Chart   [Info]
Right click to copy

b)

Result 2: One sample Z statistics with data   [Info]
95% confidence interval results:
μ : mean of Variable
Std. Dev. not specified
Variable n Sample Mean Std. Err. L. Limit U. Limit
softdrinks/wk 154 5.071429 0.50109017 4.0893097 6.0535474

Part 3

a)

Result 3: Histogram   [Info]
Right click to copy

b)

Result 4: Two sample Z statistics with data   [Info]
95% confidence interval results:
μ1 : mean of softdrinks/wk (Std. Dev. not specified)
μ2 : mean of days/exercise (Std. Dev. not specified)
μ1 - μ2 : mean difference
Difference n1 n2 Sample Mean Std. Err. L. Limit U. Limit
μ1 - μ2 154 154 2.6038961 0.52622235 1.5725193 3.635273

I chose the z interval because quite simply the videos showed this way.  When I attempted the t interval the data didn't look normal and was more of a graph with x and y.  Result #4 I compared the amt of soft drinks per week to the days of week of exercise.  This component is helpful because it could see if there is any trends with the amount of soft drinks and exercise to overweight or obesity.  A lot of theories come out these days to show that soft drinks are "empty calories" and directly cause a person to weigh more.

HTML link:
<A href="https://www.statcrunch.com/5.0/viewreport.php?reportid=32800">Inferential Statistics Report part 4</A>

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