Use the accompanying grade point average data to find 80%, 85%, and 99% confidence intervals for the mean gpa. See chart attached. A) An 80% confidence interval for mean goal is ___ , _____ B) An 85% confidence interval for mean goal is ___ , _____ C) An 99% confidence interval for mean goal is ___ , _____ (Use ascending order. Round 2 decimal places as needed.)
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Use the accompanying grade point average data to find 80%, 85%, and 99% confidence intervals for the
A) An 80% confidence interval for mean goal is ___ , _____
B) An 85% confidence interval for mean goal is ___ , _____
C) An 99% confidence interval for mean goal is ___ , _____
(Use ascending order. Round 2 decimal places as needed.)
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- According to the American Management Association, most U.S. companies now test at least some employees and job applicants for drug use. The U.S. National Institute on Drug Abuse claims that about 15% of people in the 18-25 age bracket use illegal drugs. Allyn Clark, a 21 year-old college graduate, applied for a job at the Acton Paper Company, took a drug test, and was not offered a job. He suspected that he might have failed the drug test, even though he does not use drugs. In checking with the company's personnel department, he found that the drug test has 99% sensitivity, which means that only 1% of drug users incorrectly test negative. Also, the test has 98% specificity, meaning that only 2% of nonusers are incorrectly identified as drug users. Allyn felt relieved by these figures because he believed that they reflected a very reliable test that usually provides good results. But is this really true? The accompanying table shows data for Allyn and 1,499 other job applicants. Based…Do single-parent families tend to be more impoverished than families with two parents? In order to test if there is a relationship between family structure and family income level, family researcher studied a sample of 35 one-parent and 65 two-parent families in a particular city to determine whether their total family income fell below the poverty level. _________________________Family Structure____________________________ Total family Income One Parent Two Parents TOTAL Below poverty level 24 20 44 Not Below Poverty Level 11 45 56 Total 35 65 100 What are the independent and dependent variables.? What is the null hypothesis? What test should we use?…A nonprofit organization conducted a survey of 2040 metropolitan-area teachers regarding their beliefs about problems that hamper students' schooling. The following data were obtained. 850 said that lack of parental support is a problem. 850 said that abused or neglected children are problems. 660 said that malnutrition or students in poor health is a problem. 110 said that lack of parental support and abused or neglected children are problems. 100 said that lack of parental support and malnutrition or poor health are problems. 130 said that abused or neglected children and malnutrition or poor health are problems. 20 said that lack of parental support, abuse or neglect, and malnutrition or poor health are problems. What is the probability that a teacher selected at random from this group said that lack of parental support is the only problem hampering students' schooling? Hint: Draw a Venn diagram. (Round your answer to three decimal places.)
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