you want to test the Claim that a police department Is oleiny raci al profiling when they are pullınc peoplé auer. in a Sample. of 411 black Citizens t was fornd that 109 Of them had been pulleed over While in another Sample. it was fand that ort of 437 oe white Citizens 78 Of them had been pulled aNeer Test the ClaLm that the propretions are not equal. Of .07. Ctwo) use Significance Tevel
Q: part D
A: Solution
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- A poll done for Newsweek found that 10% of Americans have seen or sensed thepresence of an angel. A contingent doubt that the percent is really that high. Itconducts its own survey. Out of 85 Americans surveyed, only 5 had seen or sensedthe presence of an angel. As a result of the contingent’s survey, would you agreewith the Newsweek poll? In complete sentences, also give three reasons why thetwo polls might give different results.A nationwide survey claimed that at least 55% of parents with young children condone spanking their child as a regular form of punishment. In a random sample of 100 parents with young children, how many would need to say that they condone spanking as a form of punishment in order to refute the claim at a=0.5 a.You would need exactly 46 parents to support spanking to refute the claim. b.You would need more than 46 parents to support spanking to refute the claim. c.You would need 46 or less parents to support spanking to refute the claim. d.You would need 47 or less parents to support spanking to refute the claim.The quality inspector of a certain factory states that 3% of outgoing products have major defects. A sample of 200 products have 5 defective products. Is there strong evidence that the statement of the quality inspector is true? Use α = 0.05
- A statistician read that 77% of the population oppose replacing $1 bills with $1 coins. To see ifthis claim is valid, he selected a sample of 80 people and found that 55 were opposed toreplacing the $1 bill. At α = 0.01, test the claim that at least 77% of the population are opposedto changein noura art class1 out of 10 paintings that she makes willbe chosen for an art show. if she is preparing 9 paintings for the competition what is the probabilty that exaactly two of them will be chosen36% of canadians are single and 20 % are corona infected whereas 12 % are single and corona infected. Given that a selected individual is married, the probabilty that he/ she is corona infected 0.750 0.125 0.250 0.875
- 2.A poll done for Newsweek found that 13% of Americans have seen or sensedthe presence of an angel. A contingent doubts that the percent is really that high.It conducts its own survey. Out of 76 Americans surveyed, only two had seenor sensed the presence of an angel. As a result of the contingent’s survey, wouldyou agree with the Newsweek poll? In complete sentences, also give threereasons why the two polls might give different results.The television show NBC Sunday Night Football broadcast a game between the Coltsand Patriots received a share of 22, meaning that among the TV sets in use, 22% were tuned to thegame (based on Nielson data). An advertiser wants to obtain a second opinion by conducting itsown survey, and a pilot survey begins with 33 households having TV sets in use at the time of thatsame NBC Sunday Night Football broadcast.Find P(X≤6)=?In a bag of 330 chocolate candies, 34 of them are brown. The candy company claims that 13% of its plain chocolate candies are brown. For the following, assume that the claim of 13% is true, and assume that a sample consists of 330 chocolate candies. a. Values of ? brown candies or greater are significantly high.
- In 1975, the automobile industry determined t hat 40% of American carowners drove large cars, 20% drove intermediate-sized cars, and 40% drove small cars. A second survey in 1985 showed that 70% of the large-car owners in 1975 still owned large cars in 19 5, but 30% had changed to an intermediate-sized car. Of those who owned intermediate-sizedcars in 1975, 10% had switched to large cars, 70% cont inued to driveintermediate-sized cars, and 20% had changed to small cars in 19 5.Finally, of the small-car owners in 1975, 10% owned intermediate-sizedcars and 90% owned small cars in 19 5. Assuming that these trendscontinue, determine the percentages of Americans who own cars of eachsize in 1995 and the corresponding eventual percentages.A law enforcement agent believes that 80% of the drivers stopped on Saturday nights for speeding are under the influence of alcohol. Suspecting that the proportion under the influence may be higher than 80%, a SRS of 140 drivers who were stopped for speeding on a Saturday night was taken. 119 of the drivers in the sample were under the influence of alcohol. The correct set of hypotheses is Group of answer choices Ho: p = 0.80 vs Ha: p = 0.85 Ho: p = 0.80 vs Ha: p > 0.80Globally, 35% of all ridged brittleshell tortoises have spots on their shells. A herpetologist in Citition collects a sample of 38 ridged brittlesell tortoises and finds that 16 of them have spots on their shells. The herpetologist would like to test the claim that the proportion of ridged brittleshell tortoises in Cititon with spots on their shells is greater than 35%. What is the null hypothesis? Use the symbols and notation. What is the alternative hypothesis? Use the symbols and notation. Which hypothesis supports this claim? The herpetologist ends up rejecting the null hypothesis. If the actual proportion of ridged brittleshell tortoises in Citition with spots on their shells is 41%, then what type of error, if any, has occurred? In the problem above, what is the test statistic?