additional instruction for letter b and c,use the critical value method ONLY

Section: Instructions: Let us now check your understanding about the concepts that you have learne in this lesson. This is a graded assessment. Do your best to solve the problems and get th correct answers. Double check your answers. Then, transfer your answers in the Assignmen the Google Classroom entitled "SUMMATIVE ASSESSMENT 4A: WEEK 4". Show your complete solution. 35 points A. Find the sample proportion. 5 points 1. n= 550, x= 308 B. Test the following hypotheses using the given information. 10 points 2. Ho : p= 0.42; Ha: px 0.42; sample size= 150, sample proportion= 0.45, a= 0.05 C. Solve the problem. 20 points 3. A researcher claims that 75% of college students would rather spend their extra money fo cell phone loads than cigarettes. Another researcher would like to verify this claim. She randomly selected 400 college students. Two hundred ninety-six of these 400 students said they would rather spend their extra money on cell phone loads than cigarettes. At 0.05 level confidence, is there enough evidence to conclude that the percentage of students who wou rather spend their extra money for cell phone loads than cigarettes is different from 75%