A company randomly selected nine office employees and secretly monitored their computers for one month. The times in hours) spent by these employees using their computers for non-job-related activities (playing games, personal communications, etc.) during
this month are given below.
7 11 9 8 11 4 14 16
Question
Numeric-Ma
Assuming that such times for all employees are normally distributed, make a 95% confidence interval for the corresponding
population mean for all employees of this company.
Round your answers to two decimal places.

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

d is the answer

step-by-step explanation:

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.