Concept explainers
In Exercises 5-18, test the given claim.
9. Is Sentence Independent of Plea? Many people believe that criminals who plead guilty tend to get lighter sentences than those who are convicted in trials. The accompanying table summarizes randomly selected sample data for San Francisco defendants in burglary cases (based on data from “Does It Pay to Plead Guilty? Differential Sentencing and the
Guilty Plea | Not Guilty Plea | |
Sent to Prison | 392 | 58 |
Not Sent to Prison | 564 | 14 |
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Elementary Statistics - With CD and Access
- Some scientists believe that the sickle-cell trait lowers the risk of developing malaria. To explore this belief, 398 children in Africa were tested for the sickle-cell trait and malaria. The results are presented in Table 1 Test, at the 5% level of significance, whether there is an association between the sickle- cell trait and malaria. Step 1: Step 2: Step 3: Step 4: Step 5: Step 6:arrow_forwardThe following table shows the cross-classification of accounting practices (either straight line, declining balance, or both) and country (either France, Germany, or United Kingdom). France Germany United Kingdom Straight Line 20 11 30 Declining Balance 14 16 15 Both 15 23 13 Set up the competing hypotheses to determine if accounting practice and country are dependent. What is the degrees of freedom for the test. Calculate the value of the test statistic ( ). Compute the p-value. Does the evidence suggest market capitalization and objective are dependent at the 1% significance level?arrow_forwardThe monthly jobs report always gets a lot of attention. Presidential candidates refer to the report when it favors their position. Referring to the August 2012 report in which only 96,000 jobs were created, Republican presidential challenger Mitt Romney stated "the weak jobs report is devastating news for American workers and American families ... a harsh indictment of the president's handling of the economy." When the September 2012 report was released showing 114,000 jobs were created (and the previous report was revised upwards), some supporters of Romney claimed the data were tampered with for political reasons. The most famous statement, "Unbelievable jobs numbers...these Chicago guys will do anything..can't debate so change numbers," was made by former Chairman and CEO of General Electricarrow_forward
- The monthly jobs report always gets a lot of attention. Presidential candidates refer to the report when it favors their position. Referring to the August 2012 report in which only 96,000 jobs were created, Republican presidential challenger Mitt Romney stated "the weak jobs report is devastating news for American workers and American families ... a harsh indictment of the president's handling of the economy." When the September 2012 report was released showing 114,000 jobs were created (and the previous report was revised upwards), some supporters of Romney claimed the data were tampered with for political reasons. The most famous statement, "Unbelievable jobs numbers...these Chicago guys will do anything..can't debate so change numbers," was made by former Chairman and CEO of General Electric In the discussion use this fact and state your side. It is known that the standard error of the monthly estimate is 55,000. Given that, what do you think of the difference between the two job…arrow_forwardThe monthly jobs report always gets a lot of attention. Presidential candidates refer to the report when it favors their position. Referring to the August 2012 report in which only 96,000 jobs were created, Republican presidential challenger Mitt Romney stated "the weak jobs report is devastating news for American workers and American families ... a harsh indictment of the president's handling of the economy." When the September 2012 report was released showing 114,000 jobs were created (and the previous report was revised upwards), some supporters of Romney claimed the data were tampered with for political reasons. The most famous statement, "Unbelievable jobs numbers...these Chicago guys will do anything..can't debate so change numbers," was made by former Chairman and CEO of General Electric It is known that the standard error of the monthly estimate is 55,000. Given that, what do you think of the difference between the two job reports?arrow_forward1. What estimator and statistical test should you use to test is survival curves of two groups are significantly different from each other? 2. explain what an interaction is.arrow_forward
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