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Created: Nov 14, 2019
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Creating Inferential Statistics Report

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.

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]

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]

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]