(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A cola company's long-term market share is estimated to be 45%. After an extensive advertising campaign, 68 out of 150 customers surveyed claimed to have purchased this company's cola recently. Was the advertising campaign a success? justify your assessment

2. Relevant equations

Let m= mean

and o=standard deviation

p=probability of success

q=probability of failure

a=alpha, significance level

3. The attempt at a solution

H0: m=0.45

H1: m<0.45

n=150

p=0.45

q=0.55

m=np

=67.5

o=sqrt npq

=6.09

x=68

a=0.01

S=o/sqrt(n)

=6.09/sqrt(150)

Z-sample:

(68-67.5)/(6.09/sqrt(150))

=P(Z<1.01)

=0.8438

I'm lost here. If this is right so far, where do I go next? I really don't even understand how I got this, basically just doing the same pattern that a note does. It's very vague though.

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# Homework Help: Normal Distribution: Hypothesis Testing

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