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QUESTION 3 Toyota provides an option of a sunroof and side airbag package for its Corolla model. This package costs $1400. Assume that prior to offering this option package, Toyota wants to determine the percentage of Corolla buyers who would pay $1400 extra for the sunroof and side airbags. How many Corolla buyers must be surveyed if we want to be 95% confident that the sample percentage is within four percentage points of the true percent all Corolla buyers

Respuesta :

Answer:

n=601

Step-by-step explanation:

Formula used:

[tex]n=z(\frac{\alpha }{2})^2\frac{p(1-p) }{E^2}[/tex]

Solution:

[tex]n=z(\frac{\alpha }{2})^2\frac{p(1-p) }{E^2}[/tex]

Where,

[tex]\frac{\alpha }{2}=0.025[/tex]

As there is no previous estimate for p

Then, p=0.5

Here on using the table

[tex]z(\frac{\alpha }{2}) =1.959963985[/tex]

Also,

E=0.04

p=0.5

Thus,

n=600.2279407

On approximating the value,

n=601