Math221 week 3 quiz - Study guides, Class notes & Summaries

1. Question: (CO 1) A survey of 128 DeVry statistics students found that 83% read the announcements each week. What is the population and what is the sample? 2. Question: (CO 1) The measurements of 100 products from the assembly line show that 99% are correct. Is this percentage a parameter or a statistic and why? 3. Question: (CO 1) Classify the data of all the political parties in the world. 4. Question: (CO 1) The data set that lists the temperatures in Albany, NY each day in the month of ...

MATH221 Week 7 Quiz Corrections to versions of Questions 1, 2, 3, 6, 23, 24, 26, 27, 28, 30 Question 1 version 3 (CO6) From a random sample of 68 businesses, it is found that the mean time that e mployees spend on personal issues each week is 45.8 5.8 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? @See text page 301 a. (5.74, 5.90) b. (5.71, 5.89) c. (5.73, 5.87) *d. (5.72, 5.88) Question 2 version 1 (CO6) If a ...

MATH221 Week 7 Quiz Corrections to versions of Questions 1, 2, 3, 6, 23, 24, 26, 27, 28, 30 Question 1 version 3 (CO6) From a random sample of 68 businesses, it is found that the mean time that e mployees spend on personal issues each week is 45.8 5.8 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? @See text page 301 a. (5.74, 5.90) b. (5.71, 5.89) c. (5.73, 5.87) *d. (5.72, 5.88) Question 2 version 1 (CO6) If a ...

MATH221 Quiz Week 7 A Formulas Included Questions 1 (CO 4) From a random sample of 55 businesses, it is found that the mean time that employees spend on persona issues each week is 5.8 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? (5.72, 5.88) (5.73, 5.87) (5.74, 5.90) (5.71, 5.89) Question 2 (CO 4) If a confidence interval is given from 8.56 to 10.19 and the mean is known to be 9.375, what is the margin of e...