Coke Analysis Phase One

8/3/2019 Coke Analysis Phase One

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Coke Analysis Project: Phase One

Stats 1510 Day

Brian Jean

By: Briana Lemmons


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Abstract

Under construction.

Introduction

In this experiment, we compared the weight of three different sodas to see which

one was the closest to staying true to the amount of soda they advertise on their can.

This is important to know because we want to make sure we are getting our money's

worth when we buy a product. Our hypothesis was that Diet Pepsi would weigh the least

and Diet Coke would weigh the most. We hypothesized that Diet Pepsi would weigh the

least because it's highly carbonated, meaning that there's more air and less product in

the can. We also hypothesized that Diet Coke would weigh the most because Coke

Zero is advertised as a lighter and more diet-conscious beverage.

Methods

All necessary information such as population size and sample size was gathered

to begin the project. The population of interest consisted of 85 cans of Diet Coke, 96

cans of Diet Pepsi, and 72 cans of Coke Zero. From each population, we took a sample

of 15. The cans from each population were numbered. Using TC Stats, and the method

of simple random sampling, we generated a set of 15 random numbers from each brand

of soda. Using this process of simple random sampling decreased the possibility of bias

in our experiment because it gave us more of a random based sample that could be

representative of our populations. We measured the weight of the cans that had the

random numbers we generated on it. The data was collected by using a balancing scale

to obtain the weight of each can that was sampled. We balanced the scale to zero


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before placing the can on the scale and recorded the weight of the can. We repeated

the process for each of the cans in each of the categories (Diet Coke, Diet Pepsi, &

Coke Zero.

Results

According to both graphs, our hypothesis was correct!

FIGURE 1 A (Box Plot)

We chose to use the box plot to display our information because it compares all

three of the colas at once. Looking at this graph, we see that Diet Coke is bell shaped,

Diet Pepsi is skewed left, and Coke Zero is slightly skewed left. This graph also shows

that Diet Coke is the heaviest and Diet Pepsi is the lightest. Unfortunately, that is

basically the limitations of this graph, so the Summary Statistics Table would be a more

appropriate graph to display.


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FIGURE 1 B (Summary Statistics)

Like the box plots shown in Figure 1 A, Figure 1 B shows the five number

summary. However, it is easier for the human eye to understand since it is in chart form

and the numbers aren't displayed in graph form. This table can be a more valuable

piece of information than the box plot because we can clearly see the standard

deviation and we can easily calculate the range and variance.

Documents

Coke Analysis Phase One