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Created: Nov 14, 2019
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Creating Inferential Statistics Report
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I  INTRODUCTION

My group 1 designed a survey to learn about whether people drink caffeinated beverages and whatkinds and how much typically. We surveyed random American Adults.Our sample was a convienience sample as our responses were voluntary and found in our immediate environments.Te total response for our survey was one hundred and sixty.

We asked the following questions:

1. Do you drink some kind of energy or caffeinated beverage?

2. Which one of the below beverages do you consume the most? a) coffee

                                                                                              b) tea

                                                                                              c) eergy drink

                                                                                              d) pop/soda

                                                                                              e) other

3. On an average day, how many of these do you drink?

4. On average, how many days a week do you drink them? (0-7)

II CATEGORICAL VARIABLE

Yes/No Survey Question: Do you drink some kind of caffeinated beverage?

Result 1: Pie Chart With Data Y/N Category   [Info]
Right click to copy

A confidence Interval for the proportion of people that DO is shown below.

Result 2: One sample proportion confidence interval Y   [Info]

One sample proportion confidence interval:


Outcomes in : Do you drink caffeinated beverages
Success : Y
p : Proportion of successes
Method: Standard-Wald

95% confidence interval results:
VariableCountTotalSample Prop.Std. Err.L. LimitU. Limit
Do you drink caffeinated beverages1441600.90.0237170820.853515370.94648463

 

 

III LOOKING at a NUMERICAL VARIABLE

3. On an average day, how many of these do you drink?

Result 3: Histogram Drinks Per Day   [Info]
Right click to copy

Result 4: Summary Stats Drinks Per Day   [Info]

Summary statistics:


ColumnnMeanVarianceStd. dev.Std. err.MedianRangeMinMaxQ1Q3
Number of drinks per day1602.3752.46226421.56916030.1240530221001013

Constructing a 95% Confidence Interval for this population mean, I used a T -Interval because my sample size is greater than 30.

Result 5: One sample proportion confidence interval Y   [Info]

One sample proportion confidence interval:


Outcomes in : Do you drink caffeinated beverages
Success : Y
p : Proportion of successes
Method: Standard-Wald

95% confidence interval results:
VariableCountTotalSample Prop.Std. Err.L. LimitU. Limit
Do you drink caffeinated beverages1441600.90.0237170820.853515370.94648463

<result6>


 

 

Data set 1. Caffeine Survey Data   [Info]
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<A href="https://www.statcrunch.com/5.0/viewreport.php?reportid=93792">Creating Inferential Statistics Report</A>

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