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?

3.63.6,

2.92.9,

3.83.8,

4.54.5,

3.23.2,

3.93.9,

3.33.3,

4.64.6,

4.14.1,

4.34.3,

4.44.4,

3.93.9,

3.23.2,

4.24.2,

3.83.8

answer: 20

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

the 3rd on is correct

step-by-step explanation: