Question

A research manager at Coca-Cola claims that the true proportion, p, of cola drinkers that prefer CocaCola over Pepsi is greater than 0.50. In a consumer taste test, 100 randomly selected people were given blind samples of Coca-Cola and Pepsi. 58 of these subjects preferred Coca-Cola. Is there sufficient evidence at the 5% level of significance to validate Coca-Cola’s claim? Conduct an appropriate hypothesis test using (i) the p-value method and (ii) the rejection point method.

Answer #1

it

In the 1970's PepsiCo., makers of Pepsi, began airing
commercials in which they claimed more cola drinkers preferred
Pepsi over Coca-Cola in a blind taste test. Assume Pepsi's claim is
that more than 50% of Coca-Cola drinkers prefer Pepsi. You work for
an independent research firm and are asked to test Pepsi's
claim.
* Identify the null and alternative hypotheses and identify the
one with the claim.
*If 280 people from a sample of 500 prefer Pepsi, find the
p-value....

The manager at Coca Cola also claims that less than a quarter of
the cans are overfilled. In her sample of 60 cans, she finds that
10 are overfilled. Is there enough evidence that the manager is
correct? Test at α = 0.05.
Set up the null and alternate hypotheses.
Compute an appropriate test statistic.
What is the p-value and what do you conclude? Explain.

You have been hired by the Coca-Cola Company to determine if
students at University prefer Coke or Pepsi. A taste test was
performed where students were given two identical cups and were
asked to taste both drinks. They had to report which drink they
prefer. It was found that 69 out of 125 students indicated they
preferred cup that contained Coke.
1. (4 pts) What is the random variable in this problem? Does the
random variable have a binomial distribution?...

The Coca-Cola Company introduced New Coke in 1985. Within three
months of this introduction, negative consumer reaction forced
Coca-Cola to reintroduce the original formula of Coke as Coca-Cola
Classic. Suppose that two years later, in 1987, a marketing
research firm in Chicago compared the sales of Coca-Cola Classic,
New Coke, and Pepsi in public building vending machines. To do
this, the marketing research firm randomly selected 10 public
buildings in Chicago having both a Coke machine (selling Coke
Classic and...

The Coca-Cola Company introduced New Coke in 1985. Within three
months of this introduction, negative consumer reaction forced
Coca-Cola to reintroduce the original formula of Coke as Coca-Cola
Classic. Suppose that two years later, in 1987, a marketing
research firm in Chicago compared the sales of Coca-Cola Classic,
New Coke, and Pepsi in public building vending machines. To do
this, the marketing research firm randomly selected 10 public
buildings in Chicago having both a Coke machine (selling Coke
Classic and...

In February 2012, the Pepsi Next product was launched into
the US market. This case study provides students with an
interesting insight into PepsiCo’s new product process and some of
the challenging decisions that they faced along the way.
Pepsi Next Case Study
Introduction
Pepsi Next was launched by PepsiCo into the US market in
February 2012, and has since been rolled out to various
international markets (for instance, it was launched in Australia
in September 2012).
The new product...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 8 minutes ago

asked 20 minutes ago

asked 36 minutes ago

asked 44 minutes ago

asked 44 minutes ago

asked 46 minutes ago

asked 58 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago