The 2015 american time use survey contains data on how many minutes of sleep per night each of 10,900 survey participants estimated they get. the times follow the normal distribution with mean 529.9 minutes and standard deviation 135.6 minutes. an srs of 100 of the participants has a mean time of x¯=514.4 minutes. a second srs of size 100 has mean x¯=539.3 minutes. after many srss, the values of the sample mean x¯ follow the normal distribution with mean 529.9 minutes and standard deviation 13.56 minutes.(a) what is the population? a. the population is 135.6 million respondents to the american time use survey. b. the population is the 100 participants in the srs. c. the population is the 10,900 respondents to the american time use survey. d. the population is all americans who sleep through the night.

.C. The population is the 10,900 respondents to the American Time Use Survey.

Step-by-step explanation:

In statistics , Population is refer to a large group of individuals or observations that have same characteristics.

A sample is a  subset drawn from it.

We are given that "The 2015 American Time Use survey contains data on how many minutes of sleep per night each of 10,900 survey participants estimated they get.  An SRS (simple random sample) of 100 of the participants has a mean time of x¯=514.4 minutes. "

i.e. The population is 10,900 respondents to the American Time Use Survey.

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.