A numerical value used as a summary measure for a sample, such as sample mean, is known as a a. population parameter. b. sample parameter. c. population mean. d. sample statistic

d. sample statistic

See explanation below

Step-by-step explanation:

Let's analyze one by one the possible options.

a. population parameter.

FALSE, a population parameter is a quantity that is related about an entire group or population and not for the sample

b. sample parameter.

FALSE, the sample can't be a parameter since we obtain statistics from sample and parameters from population.

c. population mean.

FALSE, the population mean is a parameter and is related to the population and not for the sample

d. sample statistic

TRUE, by definition a sample statistic is any quantity that we can derive from a sample selected from a population (some examples are the sample mean, sample deviation , sample median)

So then we can conclude that a summary value obtained from the sample is known as: sample statistic.

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3

51840000 cm 2

step-by-step explanation: