Question

Time Limit: 01:3000SX + Gisted below are studex B Confidence interval Cox valX CA Data Set Includes 10X rating E2580%88+ courses, where ch?q=Usted below are student-evaluation ratings Do Homework Omar Merinos - Moda Firefox https://www.math.com/Student/Player Homework.aspx?homeworkid-541684105&questionid=25&flushed=true&c. Omar Merinos & 11/29/19 4:25 PM STA2023MONDAY(IAC)FALL 2019 Homework: HOMEWORK # Save vold 4 de uni Score: 0 of 1 pt 26 of 35 (31 complete) HW Score: 83.81%, 29.33 of 35 pts Question Help 7.2.23-T s 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? 38,32,39,46, 31, 39, 35, 46, 45, 42,4 2,37,35, 3.8.40 at do What is the confidence interval for the population mean? (Round to two decimal places as needed) is ar uden 09. anc Enter your answer in the edit fields and then click Check Answer ing of Clear All Check Answer ► 1 remaining

Answer 1

We know,
X – μ s/νη
~ $\large t_{n-1}$

The 99% confidence interval of the population mean is:

[
U/ 1–u'46607 – X S
,
X + to.995,n-1 Tn
], where, $\large \overline{X}$ = 3.9, s = 0.4660, n = 15

= [3.9 - 0.3546, 3.9 + 0.3546] = [3.5454, 4.2546] (Ans).