{"id":183691,"date":"2018-02-20T23:50:30","date_gmt":"2018-02-20T23:50:30","guid":{"rendered":"https:\/\/writemyessayfree.com\/computing-z-scores"},"modified":"2018-10-24T09:12:53","modified_gmt":"2018-10-24T09:12:53","slug":"computing-z-scores","status":"publish","type":"post","link":"https:\/\/www.benedictsol.com\/blogs\/computing-z-scores\/","title":{"rendered":"Computing z Scores"},"content":{"rendered":"

Complete the following questions. Enter answers and explanations in this document. Show calculations in an Excel file, using a separate worksheet (tab) for each question.<\/p>\n

    \n
  1. Police departments use exams as part of their promotion process where officers have to score higher than 80% of those taking the exam to be considered for promotion. (This is a z<\/em>-score of 0.83 or above). Two officers write their exams. Police officer #1 receives a grade of 70 and police officer #2 receives a grade of 72. Note that the mean (of all officers taking the exam is) is 62 and the standard deviation is 11.<\/li>\n
  2. Calculate the z<\/em>-score for Police officer #1. Was this score high enough to be considered for promotion?<\/li>\n
  3. Calculate the z<\/em>-score for Police officer #2. Was this score high enough to be considered for promotion?<\/li>\n
  4. Examination of court records in a particular state shows that mean prison sentence length for first-offense drug dealers is 26 months with a standard deviation of two months. The records reveal that sentence lengths are approximately normally distributed.<\/li>\n
  5. What percentage of first time convictions for drug dealing receive 24 or fewer months?<\/li>\n
  6. A defense attorney was concerned that her client\u2019s sentence was particularly harsh at 29 months. What is the probability of receiving a sentence length of 30 months or more? Would you agree with the defense attorney that 29 months is harsh? Why or why not?<\/li>\n
  7. Another defense attorney is pleased that her client received a sentence of 20 months. How likely is it that a person would receive a sentence of 20 or fewer months? Do you think the defense attorney is right to be pleased? Why or why not?<\/li>\n
  8. A researcher talks with 20 heroin addicts to find out how many times they have shoplifted in the past week. The data are as follows: 5, 1, 2, 0, 6, 0, 3, 8, 6, 9, 3, 0, 9, 1, 2.<\/li>\n
  9. Calculate the mean and standard deviation for the number of incidents of shoplifting.<\/li>\n
  10. What is the z<\/em>-score for an addict that has shoplifted 6 times?<\/li>\n
  11. What is the percentage of heroin addicts who have shoplifted 6 or more times in the last week? Would you say it is unusual to find heroin addicts who have shoplifted 6 or more times?<\/li>\n
  12. Find the z<\/em>-score for an addict who shoplifted once (1) in the past week.<\/li>\n
  13. What percentage of addicts shoplifted 1 or fewer times in the past week?<\/li>\n
  14. Domestic violence in the United States is a serious problem. Once arrested, offenders are likely to re-offend. Domestic violence counseling programs define success when an offender completes a counseling program and goes six or more months (180 days) without re-offending.<\/li>\n<\/ol>\n

    One study found that for men who do re-offend, the 95% confidence interval on days to re-offend is 20.79 to 46.21. Please interpret and explain in your own words what this confidence interval means.<\/p>\n

     <\/p>\n","protected":false},"excerpt":{"rendered":"

    Complete the following questions. Enter answers and explanations in this document. Show calculations in an Excel file, using a separate worksheet (tab) for each question. Police departments use exams as part of their promotion process where officers have to score Read More …<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-183691","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts\/183691","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/comments?post=183691"}],"version-history":[{"count":0,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/posts\/183691\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/media?parent=183691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/categories?post=183691"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.benedictsol.com\/blogs\/wp-json\/wp\/v2\/tags?post=183691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}