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zaharov [31]
3 years ago
5

Identify which type of sampling is used. A rescarch team wants to study the demographics of 9) college students in the U.S. usin

g proportionate samples of students in U.S. percentages majors reflecting actual
A) Convenience
B) Cluster
C) Stratified
D) Simple random
E) Systematic
Mathematics
1 answer:
Setler79 [48]3 years ago
7 0

Answer:

C) Stratified

Step-by-step explanation:

Stratified sampling is a type of sampling technique where the samples are arranged in a sequence of layers called strata. An example of Stratified sampling is proportionate stratification. Here the size of the sample n is harmonious to the population size of the strata. Stratified sampling exhibit the method that makes use of the division of the total groups into smaller subgroups known as strata to conclude the statistical process of sampling.

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viktelen [127]

Answer:

y=11,600x+6,000

Yearly sales in 1990: $98,800.

Step-by-step explanation:

We have been given that the sales of a certain appliance dealer can be approximated by a straight line. Sales were $6000 in 1982 and $ 64,000 in 1987.

If at 1982, x=0 then at 1987 x will be 5.

Now, we have two points (0,6000) and (5,64000).

\text{Slope}=\frac{64,000-6,000}{5-0}

\text{Slope}=\frac{58,000}{5}

\text{Slope}=11,600

Now, we will represent this information in slope-intercept form of equation.

y=mx+b, where,

m = Slope,

b = Initial value or y-intercept.

We have been given that at x=0, the value of y is 6,000, so it will be y-intercept.

Substitute values:

y=11,600x+6,000

Therefore, the equation S=11,600x+6,000 represents yearly sales.

Now, we will find difference between 1990 and 1982.

1990-1982=8

To find yearly sales in 1990, we will substitute x=8 in the equation.

S=11,600(8)+6,000

S=92,800+6,000

S=98,800

Therefore, the yearly sales in 1990 would be $98,800.

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Step-by-step explanation:

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Step-by-step explanation:

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