A. Directions: In each problem below, give the null and alternative hypotheses and identify whether it is righttailed, lefttaed or twotailed test. 1. A sample of EDD items produced on a new machine showed that 43 of them are defective. The factor}? will get rid the machine if the data indicates that the proportion of defective items is significantlyT more than 5%. At a significance level of 10% does the factoryr get rid of the machine or not? 2. A drug manufacturer claims that fewer than 10% of patients who take its new drug for treating certain pneumonia will experience nausea. In a random sample of EEG patients, 23 experienced nausea. Perform a significance test at the 5% significance level to test this claim. 3. In a group of 3?.3 Senior High School students, 40- were lefthanded. Is this sig,'lrificantl.:r different from the proportion of all Senior High School students who are lefthanded, which is 12%