Judging on the basis of experience, a politician claims that 46% of voters in a certain...
Judging on the basis of experience, a politician claims that 46% of voters in a certain area have voted for an independent candidate in past elections. Suppose you surveyed 25 randomly selected people in that area, and 17 of them reported having voted for an independent candidate. The null hypothesis is that the overall proportion of voters in the area that have voted for an independent candidate is 46%. What value of the test statistic should you report? The test statistic is z equals ?
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Judging on the basis of experience, a politician claims that
46% of voters in a certain...
Question 4 0.8 pts Suppose you are hired by a firm to determine what proportion of...
Question 4 0.8 pts Suppose you are hired by a firm to determine what proportion of voters voted for a certain candidate. The media reports that 52 percent of individuals voted for candidate A in the last election. You randomly sample 100 individuals, you find that 34 people voted for candidate A. Let denote the true proportion of the population that voted for candidate A. You test the null hypothesis that 0-0.52. If you fail to reject the null hypothesis...
A news article that you read stated that 51% of voters prefer the Democratic candidate. You...
A news article that you read stated that 51% of voters prefer the Democratic candidate. You think that the actual percent is smaller. 127 of the 260 voters that you surveyed said that they prefer the Democratic candidate. What can be concluded at the 0.01 level of significance? a). For this study, we should use _____________ b). The null and alternative hypotheses would be: Ho: (please enter a decimal) H1: (Please enter a decimal) c). The test statistic = (please...
You are conducting a study to see if the proportion of voters who prefer the Democratic...
You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is significantly different from 51% at a level of significance of a -0.01. According to your sample, 37 out of 74 potential voters prefer the Democratic candidate a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? ? please enter a decimal) (Please enter a decimal) c. The test statistic (please show your...
A local politician running for reelection claims the mean prison time for car thieves is less...
A local politician running for reelection claims the mean prison time for car thieves is less than the required 6 yrs. A sample of 80 convicted car thieves was randomly selected and the mean length of prison time was found to be 5.5 yrs. with a standard deviation of 1.25 yrs. alpha=0.05 State the claim mathematically. Is the claim the null or alternative hypothesis? State your hypotheses. Determine the test of significance (t-test or z-test) and justify your choice. State...
Only 14% ofregistered voters voted in the last election will voter participation change for the upcoming election? Of the 369 randomly selected registered voters surveyed, 63 of them will vote in...
Only 14% ofregistered voters voted in the last election will voter participation change for the upcoming election? Of the 369 randomly selected registered voters surveyed, 63 of them will vote in the upcoming election. What can be concluded at the α-0.01 level of significance? a. For this study, what sampling distribution would be used? Select an answer b-The null and alternative hypotheses would be: (please enter a decimal) Hİ : [pvi-[ (Please enter a decimal) c. The test statistic? d....
A news article that you read stated that 52% of voters prefer the Democratic candidate. You...
A news article that you read stated that 52% of voters prefer the Democratic candidate. You think that the actual percent is smaller. 117 of the 244 voters that you surveyed said that they prefer the Democratic candidate. What can be concluded at the 0.10 level of significance? a. For this study, we should usez-test for a population proportion b. The null and alternative hypotheses would be: Ho: B (please enter a decimal) Ha: (Please enter a decimal) 9 C....
Only 18% of registered voters voted in the last election. Will voter participation increase for the...
Only 18% of registered voters voted in the last election. Will voter participation increase for the upcoming election? Of the 352 randomly selected registered voters surveyed, 77 of them will vote in the upcoming election. What can be concluded at the α= 0.05 level of significance? For this study, we should use Select an answer t-test for a population mean or z-test for a population proportion The null and alternative hypotheses would be: H0:? μ p Select an answer ≠...
An automobile association reported in 2010 that 39% of people in a certain region surveyed had...
An automobile association reported in 2010 that 39% of people in a certain region surveyed had admitted to driving impaired at least once in the past year. Suppose you are to survey randomly chosen people from this region to determine whether the proportion who have driven impaired at least once in the past year has changed from 2010. a. Give the null and alternative hypotheses to test whether the proportion of people from this region who have driven while impaired...
6. Ten years ago, the mean salary in a certain community was $43,208. An investor thinks it is now higher than that...
6. Ten years ago, the mean salary in a certain community was $43,208. An investor thinks it is now higher than that. In the community, 100 residents are randomly surveyed a) The sample mean and standard deviation from the 100 residents are: $45,742,5 -$ Calculate the test statistic b) Find the critical. Use a 5% significance level. c). What is the P-value? d) Do you reject or fail to reject the null hypothesis? Why? e Provide a practical interpretation of...
A USA Today article claims that the proportion of people who believe global warming is a...
A USA Today article claims that the proportion of people who believe global warming is a serious issue is 0.78, but given the number of people you've talked to about this same issue, you believe it is greater than 0.78. The hypotheses for this test are Null Hypothesis: p ≤ 0.78, Alternative Hypothesis: p > 0.78. If you randomly sample 28 people and 22 of them believe that global warming is a serious issue, what is your test statistic and...
Question 4 0.8 pts Suppose you are hired by a firm to determine what proportion of voters voted for a certain candidate. The media reports that 52 percent of individuals voted for candidate A in the last election. You randomly sample 100 individuals, you find that 34 people voted for candidate A. Let denote the true proportion of the population that voted for candidate A. You test the null hypothesis that 0-0.52. If you fail to reject the null hypothesis...
You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is significantly different from 51% at a level of significance of a -0.01. According to your sample, 37 out of 74 potential voters prefer the Democratic candidate a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? ? please enter a decimal) (Please enter a decimal) c. The test statistic (please show your...
Only 14% ofregistered voters voted in the last election will voter participation change for the upcoming election? Of the 369 randomly selected registered voters surveyed, 63 of them will vote in the upcoming election. What can be concluded at the α-0.01 level of significance? a. For this study, what sampling distribution would be used? Select an answer b-The null and alternative hypotheses would be: (please enter a decimal) Hİ : [pvi-[ (Please enter a decimal) c. The test statistic? d....
A news article that you read stated that 52% of voters prefer the Democratic candidate. You think that the actual percent is smaller. 117 of the 244 voters that you surveyed said that they prefer the Democratic candidate. What can be concluded at the 0.10 level of significance? a. For this study, we should usez-test for a population proportion b. The null and alternative hypotheses would be: Ho: B (please enter a decimal) Ha: (Please enter a decimal) 9 C....
6. Ten years ago, the mean salary in a certain community was $43,208. An investor thinks it is now higher than that. In the community, 100 residents are randomly surveyed a) The sample mean and standard deviation from the 100 residents are: $45,742,5 -$ Calculate the test statistic b) Find the critical. Use a 5% significance level. c). What is the P-value? d) Do you reject or fail to reject the null hypothesis? Why? e Provide a practical interpretation of...
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