Testing Proportions

The following are steps when testing hypothesis concerning a proportion EXCEPT____.

• Choose the level of significance.

• Compute the test statistic.

• Determine the accepted value.

• State the null and alternative hypotheses.

Formulate the null and alternative hypotheses of the problem.

The principal of a certain high school claims that 85% of all the students are in favor of the new school uniform. A Statistics teacher asked his students to verify the claim. Suppose that 451 out of the 550 randomly selected students indicated that they are in favor of the new school uniform. At 0.05 level of confidence, is there enough evidence to conclude that the percentage of students who are in favor of the new school uniform is different from 85%?

What is the appropriate test statistic to test the hypothesis about the population proportion ρ?

• 
• 
• 
• 

Given the values of x = 105 and n = 150, what is the value of the sample proportion?

• 0.6

• 0.7

• 0.8

• 0.9

• -1.96

• -1.64

• 1.64

• 1.96

What is the decision of the given normal curve?

• Accept H_a

• Accept H_o

• Reject H_a

• Reject H_o