Math 221 week 4 quiz - Study guides, Class notes & Summaries

(TCO 6) In the standard normal distribution, the standard deviation is always Student Answer: 0 1 2 none of these 2. Question : (TCO 6) The area under a normal curve with mu = 8 and sigma = 3 is Student Answer: 0 1 2 none of these 3. Question : (TCO 6) If Larry gets a 70 on a physics test where the mean is 65 and the standard deviation is 5.8, where does he stand in relation to his classmates? Student Answer: He is in the top 10%. He is in the top 20%. He is in the bottom 20%. He is in the botto...

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...