Anational grocery store chain designed a study to determine whether its customers would be interested in home delivery. the chain randomly surveyed 1,000 customers from around the country. it concluded from the study that 80% of all customers who shopped in the chain's stores were interested in the service. what is the parameter of the study's population?

The parameter of the study's population is the 80% of all customers who shopped in the chain's stores that were interested in the home delivery service.

Population parameter is defined as any summary number that describes the entire population. It can be an average or a percentage/

The 1,000 customers that were surveyed are the sample of the population. They basically represent the population of the chain's customers. 

I think it is A) 1,000

Step-by-step explanation:

answer

m = (√3)/2

θ = 30°

explanation

the diagram in the question is unit circle.

part 1

we can find the value of m using pythagoras theorem.

c² = a²+b²

1² = (1/2)² +m²

m² = 1 - 1/4

=3/4

m = √(3/4)

=(√3)/2

part 2

to find the angle we can use the sine rule

sin θ = (1/2)/1

= 1/2

θ = sin⁻¹(1/2)

= 30°