Question

Recall that a confict of interest scenario was presented to a sample of 204 marketing researchers and that 111 of these researchers disapproved of the actions taken. (a) Let p be the propotion of all markering researchers who disapprove of the actions taken in the contlic of interest scenario. Set up the null and alternatlve hypotheses needed to attempt to provide evidence suppoirting the clalm that a majority (more than 50 percent) of all marketing researchers disapprove of the actions taken versus Ha p (b) Assuming tha the sample of 204 marketing researchers has been randomly selected, use critical values and the previously given sample information to test the hypotheses you set up in parta at the 10, 05,.01, and.001 levels of significance. How much evidence is there that a majority of all marketing researchers disapprove of the actions taken? (Round to 4 decimal places for calculations and z value to 2 decimal places.) Reject Ho atano values Insufficiant evidance (e) Suppose a random sample of 1,000 marketing researchers reveals that 544 of the researchers disapprove of the actions taken in the conflict of interest scenario. Use critical values to determine how much evidence there is that a majority of all marketing researchers disapprove or the actions taken. (Round ? to 4 decimal places for calculations and Z value to 2 decimal places. 7,081 Reject He at c = 0 1 0.05, and 0.01 ' ' | very strong evidence (d) Note that in parts b and c the sample proportion is (essentially) the same. Explain why the results ot the hypothesis tests in parts b and c ditter 5440 based on a much larger sample providas stronge evidence that p is greater tharn 50

Answer 1

Sample props bion P Pu-p) c) 106 근tal PC1-p)