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3 years ago

Which choice best describes a simple random sample?

Mathematics

1 answer:

Dimas [21]3 years ago

7 0

Answer:

a. a selection of members from a population in such a way that every possible sample of the same size has an equal chance of being chosen.

Step-by-step explanation:

In the process of simple random sampling, a subset of the population is directly randomly chosen from the whole population, without dividing the population in groups (like in cluster sampling), without taking proximity into account (like in convenience sampling) or using set intervals (like in stratified sampling). In simple random sampling, every possible subset of the same size has the same probability of being selected.

Therefore, the statement that better fits this description is alternative a.

You might be interested in

56 is decreased to 11

nexus9112 [7]

Answer:

56 decreases to 11 because 45 was subtracted from it.

56-45=11

4 0

3 years ago

Read 2 more answers

astronomers measure large distances in light years one light year is the distance that light can travel in one year or approxima

sveticcg [70]

What you can do in this case is the following rule of three to find the result:
1 light year ---> 5.88 * 10 ^ 12 miles
3.2 * 10 ^ 2 light year ---> x
Clearing x we have:
x = ((3.2 * 10 ^ 2) / (1)) * (5.88 * 10 ^ 12)
x = 1.88 * 10 ^ 15 miles
answer:
In scientific notation, approximately it is 1.88 * 10 ^ 15 miles

8 0

3 years ago

Need help vrtfv fvvfgsf

maksim [4K]

Answer:

b = 8

Step-by-step explanation:

Use the Pythagorean theorem

c^2 = a^2 + b^2

c = 10

a = 6

b = ?

Substitute into the formula

10^2 = 6^2 + b^2

100 = 36 + b^2 Subtract 36 from both sides

100 - 36 = b^2 Combine

64 = b^2 Take the square root of both sides.

√64 = √b^2

b = 8

7 0

2 years ago

Write the quadratic equation whose roots are -2 and 1, and whose leading coefficient is 4 .

Kaylis [27]

Answer: the equation is

4x^2 + 4x - 12

Step-by-step explanation:

A quadratic equation is an equation in which the highest power of the unknown is 2.

The general form of a quadratic equation is expressed as

ax^2 + bx + c

Where

a is the leading coefficient

c is a constant

Assuming we want to write the quadratic equation in x, from the information given, the roots which are given are -2 and 1 and the leading coefficient is 4.

Therefore, the linear factors of the quadratic equation will be (x+2) and (x-1)

the equation becomes

(x+2)(x-1)

= x^2 - x +2x - 3

= x^2 + x - 3

Given a leading coefficient of 4, we will multiply the quadratic expression by 4. It becomes

4(x^2 + x - 3)

= 4x^2 + 4x - 12

7 0

3 years ago

Marissa has twice as much money as Frank. Christina has $20 more than Marissa. If Christina has $100, how much money does Frank

qwelly [4]

Answer:

a. Take a grid that shows represents the amount of money Frank has,

Say F,

( shown below ),

b. Since, Marissa has twice as much money as Frank,

So, the amount Marissa has = 2F

If M represents the amount Marissa has,

M = 2F

c. Now, Christina has $20 more than Marissa,

Add 20 to the grid M

d. The below diagram provides enough information to determine the value of the variable m

e. The amount Christina has = M + 20 = 2F + 20

According to the question,

2F + 20 = 100

2F = 80

F = 40

Hence, the amount frank has = $ 40,

Amount Marissa has = 2(40) = $ 80,

3 0

3 years ago