Question

PLEASE HELP

the results of a random sample of 1000 people are recorded in table one use this data to answer the questions that follow of the 320 million people in the united states how many would you predict wear contact lenses

Answer 1

39.68 million[

Explanation:

Remember that the sample is 1000 people.

Of those 1000 people we know that 762 wear corrective lenses. 124 of these people wear contact lenses.

The probability that a randomly selected person will wear contact lenses is:

`P = (124)/(1000)\\\\P = 0.124`

Then, the expected number of people who wear contact lenses is:

`N = 320 * P`

Where N is given in units of millions.

`N = 320 * 0.124`

`N = 39.68\ million`

Answer 2

204,160,000

Explanation:

Assuming the sample is a good representation of the people from the United States.

Since there were 1,000 surveyed... and 638 of them were wearing glasses, that makes a proportion of 638 out of 1,000 people, or 63,8 / 100 people... so 63.8%... or 0.638

So, if we assume that the US population is of 320 million, how many people does that make wearing glasses.... we just have to multiply 320M by 0.638

G = 320,000,000 * 0.638 = 204,160,000