Aapram.wthi Yer: × ® Sketch! Kanave kanaveh. aos a search My Account Student cou

Question

Aapram.wthi Yer: × ® Sketch! Kanave kanaveh. aos a search My Account Student course.work A company is will ng to rene w its advertising contract with a local radio station oly if the station can demonstrate that more than 20% of all residents of the city have heard the ad and recognize the company's product. The radio station proposes conducting a phone survey of 400 randomly selected people inthe city n order to test that the proportion of all residents in the city for whom the ad was effective is more than 20%. Question 12 Subquestions 12.a 1 point(s) The station plans to conduct the test using a 10% level of significance, but the company wants the significance level lowered to 5%. For significance will the probability of correctly concluding that the ad was effective for more than 20% of all residents be higher? of 5% 1096 The level of significa ce used will not effect the probability of correctiy ncluding that the ad was effective for more than-us of all residents They finally agree on the significance level that will be used, but the company proposes that the station call 600 people instead of the 400 initially proposod. For the given significance level, wil the proposal of contacting 600 (over 400) people make the probability of a Type lIl error higher or lower? 12.b Higher Type here to search

Explanation / Answer

Answer - 12a) The probability of rejecting null hypothesis increases as we increase the level of significance. So, it would be higher for 10%.

Option B is correct.

Answer - 12b) Increasing the sample size decreases Type II error.

Hence,

The answer is Lower

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