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darksky4658
15.04.2020 •
Mathematics
In a recent survey of 150 teenagers, 93 stated that they always wear their seatbelt when they travel in a car. Assuming the distribution is approximately normal, find the point estimate and standard error for the proportion of teenagers that always wear a seatbelt when traveling in a car. Round your answers to three decimal places, as needed.
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Ответ:
The estimated standard error is given by:
Step-by-step explanation:
For this case we have the following data:
n =150 represent the sample size selected
x = 93 people stated that they always wear their seatbelt when they travel in a car
For this case the the proportion estimated is :
We can can check if we can use the normal approximation :
So then we can use the normal approximation and the distribution for the proportion is given:
The estimated standard error is given by:
Ответ:
Step-by-step explanation:
Any number equal to x decreased by 6 can be written as "x-6".