Question 4(Multiple Choice Worth 6 points) (03.03 HC)
If x=-2 is a zero of the polynomial function f(x) = 2x3 + 9x2 - 8x – 36, which of the following is another zero of f(x)?
Ox=8
Ox=4
Ox=3
Ox=2
Question 5 Multiple Choice Worth 6 points)

(a)

(b) The best  point estimate of is the sample mean

The margin of error =  4.552

Step-by-step explanation:

Given : The confidence interval for the population mean =  (13.046 , 22.15)

Sample mean :

Standard deviation :

Sample size :

a. Let represents the population mean.

Then we can write the confidence interval for the population mean as :-

b. The best  point estimate of is the sample mean

Also, the lower limit of confidence interval can be written as

i.e.

Hence, the margin of error =  4.552