Suppose a sample of 1475 floppy disks is drawn. Of these disks, 1328 were not defective. Using the data, construct the 80%confidence interval for the population proportion of disks which are defective. Round your answers to three decimal places. Lower:
Upper:

The 80% confidence interval estimate of the true population proportion of disks which are defective is 0.100 +/- 0.010

= (0.090, 0.110)

Lower: 0.090

Upper: 0.110

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

p+/-z√(p(1-p)/n)

Given that;

Proportion of disks which are not defective p' = 1328/1475 = 0.900

Proportion of disks which are defective p = 1 - p' = 1 - 0.900 = 0.100

p = 0.100

Number of samples n = 1475

Confidence interval = 80%

z value(at 80% confidence) = 1.28

Substituting the values we have;

0.100 +/- 1.28√(0.100(1-0.100)/1475)

0.100 +/- 1.28(0.007811334658)

0.100 +/- 0.009998508363

0.100 +/- 0.010

= (0.090, 0.110)

The 80% confidence interval estimate of the true population proportion of disks which are defective is 0.100 +/- 0.010

= (0.090, 0.110)

Lower: 0.090

Upper: 0.110

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.

d is the correct answer

step-by-step explanation:

x= 8 because 3x = 3 * 8, and 3*8 = 24