A- A- 三,三,三 AaBbCcD AaBbCcDdE AaBb0 AaBbCcDdEe AaBbCcDdEe Normal No Spacing Heading 1 Heading 2 Title 2 (Problems 6– 10) An investigator polls a representative sample of common cold sufferers, asking...

question 6


Extracted text: A- A- 三,三,三 AaBbCcD AaBbCcDdE AaBb0 AaBbCcDdEe AaBbCcDdEe Normal No Spacing Heading 1 Heading 2 Title 2 (Problems 6– 10) An investigator polls a representative sample of common cold sufferers, asking them to estimate the number of hours of physical discomfort caused by their most recent cold. Their estimates approximate a nomal curve with a mean of 83 hours anda standard deviation of 20 hour. 6. What percentage of sufferers estimate that their colds lasted for longer than forty-eight hours? 7. What percentage suffered for fewer than 61 hours? 8. What percentage suffered for between one and three days? 9. Inverse Normal Distribution: What is the estimatèd number of hours for the shortest-suffering 10 percent? 10. Inverse Normal Distribution: A medical researcher wishes to concentrate on the 20 percent who suffered the most. She will work only with those who estimate that they suffered for more than hours, nglish (United States) O Focu MacBook Air 吕0 F3 O00 F4 F6 F7 F8 F9 F10 #3 $ 4 % & 6 7 9 * CO