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Scoobiegal
06-11-2009, 03:48 PM
Can anyone help me with this problem, I would greatly appreciate it. Thank you for your help.

A medical school claims that more than 28% of its students plan to go into general practice.

a. It is found that among a random sample of 130 of the school’s students, 42 of them plan to go into general practice. Does this sample evidence support the school’s claim? Use the p-value approach and  = 0.05 to make your decision.


b. Suppose a second sample is collected a year after the first with the results indicating 57 out of 135 plan to go into general practice. Does this sample evidence support the school’s claim? Use the p-value approach and  = 0.05 to make your decision.

vicki
06-15-2009, 02:51 AM
For part a, first you need to calculate the sample proportion, 42/130=0.323, then the test statistic T= (0.323-0.28)/sqrt(0.28*(1-0.28)/130). The p-value can be calculated by P(Z>T).