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

Name: Date: Section: CORMAT2 SA 4A Instructions: Let us now check your understanding about the concepts that you have learned in this lesson. This is a graded assessment. Do your best to solve the problems and get the correct answers. Double check your answers. Then, transfer your answers in the Assignment of 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 for 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 that they would rather spend their extra money on cell phone loads than cigarettes. At 0.05 level of confidence, is there enough evidence to conclude that the percentage of students who would rather spend their extra money for cell phone loads than cigarettes is different from 75%