Question

A simple random sample of 200 drivers were asked if they drive a car manufactured in a certain

country. Of the 200 drivers surveyed, 120 responded that they did. Test the claim that more than 50% of

all drivers drive a car made in this country at the 0.05 level of significance.

(For full credit need to draw

the curve and shade the area)

Answer 1

The null and alternate hypothesis are:

H0:

Ha:

The test statistic value is given by:

Since this is a right tailed test, so the critical-value is given by:

Since test statistic is greater than critical-value, so we have sufficient evidence to reject the null hypothesis
H0.

Thus we can conclude that .