Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 95% confidence level. What does the confidence interval tell about the population of all college students in the state?
3.7, 2.9, 3.9, 4.7, 2.9, 3.9, 3.8, 4.9, 4.3, 4.1, 4.2, 4.0, 3.4, 3.9, 3.6
From the given data,
mean = 3.9
s = 0.5557 , n = 15
The t value at 95% confidence interval is,
alpha = 1 - 0.95 = 0.05
alpha/2 = 0.05/2 = 0.025
df =15 -1 =14
t(alpha/2,df) = t(0.025,14) = 2.145
t value at 95% = 2.145
Margin of error = E =z *(s/sqrt(n))
= 2.145 * (0.5557/sqrt(15))
= 0.3078
CI = mean +/- E
= 3.9 +/- 0.3078
= (3.5722 , 4.1878)
THe 95% CI is (3.5722 , 4.1878)
Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent."...
Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state Construct a confidence interval using a 98% confidence level. What does the confidence interval tell about the population of all college students in the state? 3.8, 2.8, 3.7.4.9, 2.8.4.4, 3.6, 4.5, 4.7, 4.5, 4.4, 3.6, 3.3, 4.3, 4,0 What is the confidence interval for the population mean?
Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent The ratings were obtained at one university in a state Construct a confidence interval using a 95% confidence level What does the confidence interval tell about the population of all college students in the state? 39,3.0, 39,4.7,28, 40, 3.7,4.5, 43, 44, 45, 3.8, 36,39, 3.6 What is the confidence interval for the population mean p? (Round to two decimal places as needed)
Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent" The ratings were obtained at one university in a state Construct a confidence interval using a 99% confidence level What does the confidence interval tell about the population of all college students in the state? 3.7,29, 4.3, 46,2.9, 4.5, 3.5, 4.9,4.4,4.0,45, 3.5, 3.4,42,40 What is the confidence interval for the population mean μ?
Listed below are student evaluation ratings of courses, where a rating of 5 is for excellent." The ratings were obtained at one university in a state Construct a confidence interval using a 98% confidence level. What does the confidence interval tell about the population of all college students in the state? 3.8, 2.8. 3.7.4.9, 2.8.4.4.3.6.4,5, 4.7.4.5, 4.4.3.6, 3.3, 4.3.4.0 D What is the confidence interval for the population mean? <<(Round to two decimal places as needed) on than eik Chark...
Listed below are student evaluation ratings of courses, where a rating of 5 is for 'excellent." The ratings were obtained at one university in a state Construct a confidence interval using a se confidence level. What does the confidence interval tell about the population of all college students in the state? 4.1, 31, 42, 4.7.3.0, 4.5, 3.5,47,44,40,41,3,6,34,38,39 What is the confidence interval for the population mean? «Round to two decimal places as needed.) What does the confidence interval tell about...
Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 90% confidence level. What does the confidence interval tell about the population of all college students in the state? 4.0,2.9,4.3, 4.6, 3.0,4.4, 3.6,4.9, 4.1,4.2,4.4,3.9, 3.2,4.2,3.5 What is the confidence interval for the population mean μ? μ<. (Round to two decimal places as needed.)
Listed below are student evaluation ratings of courses where a rating of 5 is for excellent. The ratings were obtained at one university in a state Construct a confidence interval using a 99% confidence level What does the confidence interval tell about the population of all college students in the slate? 40,29 38.47.32 44 33 45 47,42 44.393.1.4 2,40 What is the confidence interval for the population mean? <-Round to two decimal places as needed
Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent " The ratings were obtained at one university in a state Construct a confidence interval using a 99% confidence level. What does the confidence interval tell about the population of all college students in the state? 3.9.2.9. 3.8.4.8, 2.9.4.3, 3.7.4.7.4.7.4.2, 4.1.4.1.3.4.3.9.3.6 What is the confidence interval for the population mean? << (Round to two decimal places as needed.) b. What does the confidence interval...
7.2.23-T Question Help Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent. The ratings were obtained at one university in a state. Construct a confidence interval using a 90% confidence level. What does the confidence interval tell about the population of all college students in the state? 3.6, 2.8, 4.2, 4.8.3.2, 3.9. 3.4.4.8, 4.6, 4.4, 4.2, 4.1, 3.2, 3.8, 4.1 What is the confidence interval for the population mean u? << (Round to...
Listed in the accompanying data table are student evaluation ratings of courses and professors, where a rating of 5 is for "excellent." Assume that each sample is a simple random sample obtained from a population with a normal distribution. a. Use the 93 course evaluations to construct a 98% confidence interval estimate of the standard deviation of the population from which the sample was obtained. b. Repeat part (a) using the 93 professor evaluations. c. Compare the results from part...