A concerned group of citizens wanted to know if the proportion of armed robberies in Texas was different in 2011 than in 2010. Their research showed that of the 113,231 violent crimes in Texas in 2010, 7,622 of them were armed robberies. In 2011, 7,439 of the 104,873 violent crimes were in the armed robbery category. Test at a 5% significance level. a) The null and alternative hypothesis would be: O Ho: 2010 l2011 H1: 42010 P2011 P2011 O Ho: P2010 H1: P2010 < P2011 P2011 Ho: H2010 = H2011 H1: H2010 7 H2011 b) Determine the test statistic. Round to two decimals. Z = c) Find the p-value and round to 4 decimals. P = d) Make a decision. O Reject the null hypothesis OFail to reject the null hypothesis e) Write the conclusion. O There is not sufficient evidence to support the claim that the proportion of armed robberies is different in 2011 than 2010. O There is sufficient evidence to support the claim that the proportion of armed robberies is different in 2011 than 2010.

Only c and d

Only 10% of registered voters voted in the last election. Will voter participation increase for the upcoming election? Of the 399 randomly selected registered voters surveyed, 52 of them will vote in the upcoming election. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer

Suppose that in a random selection of 100100 colored​ candies, 2323​% of them are blue. The candy company claims that the percentage of blue candies is equal to 2525​%. Use a 0.100.10 significance level to test that claim.

In a clinical trial of a drug intended to help people stop smoking, 125 subjects were treated with the drug for 12 weeks, and 14 subjects experienced abdominal pain. If someone claims that more than 8% of the drug's users experience abdominal pain, that claim is supported with a hypothesis test conducted with a 0.05 significance level. Using 0.17 as an alternative value of p, the power of the test is 0.95. Interpret this value of the power of the test. The power of 0.95 shows that there is a % chance of rejecting the hypothesis of p = when the true proportion is actually That is, if the proportion of users who experience abdominal pain is actually then there is a % chance of supporting the claim that the proportion of than 0.08. users who experience abdominal pain is (Type integers or decimals. Do not round.)

A local McDonald's manager will return a shipment of hamburger buns if more than 10% of the buns are crushed. A random sample of 81 buns finds 13 crushed buns. A 5% significance test is conducted to determine if the shipment should be accepted. The p value for this situation is:

Suppose that in a random selection of 100 colored​ candies, 23​% of them are blue. The candy company claims that the percentage of blue candies is equal to 26​%. Use a 0.05 significance level to test that claim.

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If p-value is less than the significance level (alpha), what is the decision of a hypothesis test?   a. Do not reject Ho   b. Neither reject Ho   c. Reject Ho   d. We need data to answer this question