MATHEMATICS HIGH SCHOOL

Three scenarios are given in parts a through c below. For each scenario, determine the sampling method used by the managers. a) The managers select a single branch at random and survey every employee of that branch. A. The managers used a systematic sample. B. The managers used a multistage sample. C. The managers used a cluster sample. D. The managers used a stratified sample. E. The managers used a simple random sample. b) The managers use the company e-mail directory to contact every 3030th employee on the list. Choose the correct sampling method below. A. The managers used a cluster sample. B. The managers used a multistage sample. C. The managers used a stratified sample. D. The managers used a systematic sample. E. The managers used a simple random sample. c) The managers split the company into divisions, with each division containing employees that have similar jobs. Within each division, they select a SRS of employees to contact. Choose the correct sampling

Answers

Answer 1

Answer:

Answer:

1. C. The managers used a cluster sample

2. B)The managers used a systematic sample.

3. The managers used a stratified sample.

Step-by-step explanation:

1. In a cluster sampling method, the population would be divided into several small units called cluster by the researcher. Within these clusters we randomly pick one or more to observe.

2. In systematic sampling we select elements from an ordered sampling frame.

3. In stratified sampling, the population is divided into several stratas and the researcher then selects randomly to complete the sampling process

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What are the solutions to X2 + 8X + 7 = 0?

Answers

Answer:

x = - 7, x = - 1

Step-by-step explanation:

Given

x² + 8x + 7 = 0

Consider the factors of the constant term (+ 7) which sum to give the coefficient of the x- term (+ 8)

The factors are + 7 and + 1 , since

7 × 1 = 7 and 7 + 1 = 8 , then

(x + 7)(x + 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 7 = 0 ⇒ x = - 7

x + 1 = 0 ⇒ x = - 1

Answer:

$x=-1,-7$

Step-by-step explanation:

$x^2+8x+7=0$ where a $\neq$ 0 so a = 1 b = 8 c = 7

Quadratic Formula: $x=-b(√(b^2-4ac) )/(2a)$

$x=-8(√(8^2-4(1)(7)) )/(2(1))$

$x=-8(√(64-28) )/(2)$ Evaluate the exponent and multiply 4ac

$x=-8(√(36) )/(2)$ Subtract b^2 - 4ac and multiply 2a

$x=-8(√(6) )/(2)$ Solve for the sqrt root of 35

x = - 8 ± 6/2 =

x = - 8 + 6/2 = -1

x = - 8 - 6/2 = -7

A quarter has a diameter of 2.4 m . what is it's circumference in cm

Answers

First lets convert the diameter to cm,
2.4 m equals 240 cm, that is by multiplying 2.4 times 100 because 1 meter has 100 cm
then we need to know how to calculate the circumference, and that is by multiplying pi (3.14) times the diameter of the circumference, that is:
circumference = pi*diameter = 3.14*240
circumference = 753.6 cm
that is the solution

Write 240000 in standard form

Answers

Final answer:

The standard form of 240000 in arithmetic is 240000 and in scientific notation it is 2.4 x 10^5.

Explanation:

The question is asking to write the given number, 240000, in standard form. In arithmetic, standard form usually refers to writing the number as it normally appears without any mathematical operations involved. However, in scientific notation, the standard form of a number is written as a number between 1 and 10 multiplied by a power of 10. Therefore, the standard form of 240000 in arithmetic is just 240000 whereas in scientific notation it is 2.4 x 10^5.

Learn more about Standard Form here:

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Answer:

240,000

Step-by-step explanation:

standard form means the way you would write it

The image of the point (9,0) under a translation is (7,4). Find the coordinates ofthe image of the point (0,8) under the same translation.

Answers

Answer:

(-2, 12)

Step-by-step explanation:

kirby often forgets to switch the inequity sign when dividing a negative. when solving 3x-10≥x, should kirby collect the variables on the left or the right? why?

Answers

You should collect the variable on the left side since you can't have two variables of the same letter on each side.so you would take the variable from the right side and subtract it from the left. So subtract x on both sides. Your new problem is 2x-10 is greater than or equal to 0. Now you add 10 on both sides. Your new problem is 2x is greater than or equal to 10. Now divide by 2 on both sides. Your answer would be x is greater than or equal to 5

If the green spinner is spun and then the purple spinner is spun, creating a two-digit number, what is the probability that the resulting number will be 14 or less

Answers

i think a picture should be provided to get more insight on this question

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