Research question:

It is believed that the proportion of cars with the gas tank filler on the left (driver's side) is same as the proportion with the gas tank filler on right. Formulate a hypothesis, and test it at 5% level of significance.

Hint (suggested outline - replace the highlighted area with your observations and calculations):

If the proportions are same, then it must be 0.5

Hypothesis:

H₀: p = 0.5

H₁: p ? 0.5

Here p is the population proportion of cars with the gas tank filler on the left.

To test this, we can take a random sample of cars, observe the sample proportion (of cars with gas tank filler on the left), and find the p-value of the data to come to a conclusion. Let