4) Associate with each of the following sampling methods the most appropriate example from the list, given below.
1. Simple random sample ______ 4. Systematic sample ______
2. Stratified random sample _______ 5. Quota sample ______
3. Cluster sample ______ 6. Convenience sample _____
Examples:
a) Standing at a mall or a grocery store and asking people to answer questions.
b) Names picked from a hat.
c) Every 10th person is chosen randomly from each ward in a hospital.
d) Four secondary schools in a town is selected at random, then every pupil in
that school is surveyed.
e) One person in ten is chosen from an alphabetical list of employees.
f) People are stopped in the street according to instructions such as ‘stop equal
numbers of men and women.

Answer:

790000

Step-by-step explanation:

Answer:

790,000

Step-by-step explanation:

Answer:

2.5

Step-by-step explanation:

from delta math

Answer:

can't explain how but i'm confident the answer is:

A. G(X) > -6

Answer:

The number of non-positive integral values of [tex]k[/tex] are contained in the following set:

[tex]S_{k} = \{-1, 0\}[/tex]

Step-by-step explanation:

Let be the following second order polynomial:

[tex]x^{2}-(k + 1)\cdot x + (k^{2}+k -8) = 0[/tex], [tex]k \le 0[/tex] (1)

Whose roots can be found by the Quadratic Formula:

[tex]x_{1,2} =\frac{k + 1\pm \sqrt{k^{2}+2\cdot k +1 - 4\cdot k^{2}-4\cdot k +32 }}{2}[/tex]

[tex]x_{1,2} = \frac{k+1}{2} \pm \frac{\sqrt{33-2\cdot k -3\cdot k^{2}}}{2}[/tex]

Based on the statement, we have the following system of inequations:

[tex]\frac{k+1}{2} + \frac{\sqrt{33 - 2\cdot k -3\cdot k^{2}}}{2} > 2[/tex] (2)

[tex]\frac{k+1}{2} - \frac{\sqrt{33 - 2\cdot k -3\cdot k^{2}}}{2} < 2[/tex] (3)

By (2) we have:

[tex]k + 1 + \sqrt{33-2\cdot k -3\cdot k^{2}} > 4[/tex]

[tex]\sqrt{33 -2\cdot k - 3\cdot k^{2}} > 4 - (k + 1)[/tex]

[tex]33 - 2\cdot k -3\cdot k^{2} > [4 - (k+ 1)]^{2}[/tex]

[tex]33 - 2\cdot k -3\cdot k^{2} > 16 -8\cdot (k+1)+(k+1)^{2}[/tex]

[tex]33 - 2\cdot k - 3\cdot k^{2} > 16-8\cdot k -8 + k^{2}+2\cdot k + 1[/tex]

[tex]33 - 2\cdot k -3\cdot k^{2} > 9 -6\cdot k + k^{2}[/tex]

[tex]0 > 4\cdot k^{2}-4\cdot k -24[/tex]

[tex]4\cdot k^{2}-4\cdot k -24< 0[/tex]

[tex]4\cdot (k^{2}-k-6) < 0[/tex]

[tex]k^{2}-k - 6 < 0[/tex]

[tex](k -3)\cdot (k+2) < 0[/tex]

The solution is:

[tex]k \in (-2, 3)[/tex]

Likewise, we get the following expression from (3):

[tex]k^{2}-k - 6 > 0[/tex]

[tex](k -3)\cdot (k + 2) > 0[/tex]

The solution is:

[tex]k \in (-\infty, -2)\,\cup\,(3, +\infty)[/tex]

The number of non-positive integral values of [tex]k[/tex] are contained in the following set:

[tex]S_{k} = \{-1, 0\}[/tex]

Answer:

option 2 is correct

Step-by-step explanation:

Another 2 btc please

Answer:

Solution given:

x³-3x²+x

taking common

x(x²-3x+1)

is a required answer.

Answer:

k=8

Step-by-step explanation:

Cab 1 : 1/km

Cab2: 0.5 /km with Base charge =4

x=0.5 x+4

x-0.5x=4

0.5x=4

4/0.5=x

x=8

Assume x=k

k=8

Answer:

8u =32 this is the equation

Answer and Step-by-step explanation:

8u = 32 is the answer.

This is because there are eight U's, and it is equal to 32.

#teamtrees #PAW (Plant And Water)

Answer:

B. 12

Step-by-step explanation:

I calculated it logically

You have an equation and a table with the x value given.

Replace x in the formula with the x value in the table and solve for y.

y = x^2 + 1

y = (-3)^2 + 1 = 9+1 = 10

y = (-2)^2 +1 = 4+1 = 5

y = (-1)^2 +1 = 1+1 = 2

y = (0)^2 + 1 = 0+1 = 1

y = (1)^2 +1 = 1+1 = 2

y = (2)^2 +1 = 4+1 = 5

y = (3)^2 +1 = 9+1 = 10

Answer:

All false jhgffyyhvfftuhvgfy

Answer:

[tex]r=\frac{k+7s}{4}[/tex]

Step-by-step explanation:

Answer:

$119

Step-by-step explanation:

08:00 - 12:15 = 4hrs 15mins

13:00 - 17:15 = 4hrs 15mins

Total hours worked = 8hrs 30 mins

$14/hr

14 × 8 = 112

30 mins is half of an hour so 14/2 = 7

$7 for 30 mins

112 + 7 = 119

$119

hope this helps ^^

Answer:

The standard error is [tex]s = \sqrt{\frac{\pi_1(1-\pi_1)}{n_1}+\frac{\pi_2(1-\pi_2)}{n_2}}[/tex], in which [tex]p_1,p_2[/tex] are the proportions and [tex]n_1,n_2[/tex] are the sample sizes.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the z-score that has a p-value of [tex]1 - \frac{\alpha}{2}[/tex].

The standard error is:

[tex]s = \sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

For the difference of proportions:

For proportion 1, the standard error is:

[tex]s_1 = \sqrt{\frac{\pi_1(1-\pi_1)}{n_1}}[/tex]

For proportion 2, the standard error is:

[tex]s_2 = \sqrt{\frac{\pi_2(1-\pi_2)}{n_2}}[/tex]

For the difference:

The standard error is the square root of the sum of the squares of each separate standard error. So

[tex]s = \sqrt{(\sqrt{\frac{\pi_1(1-\pi_1)}{n_1}})+(\sqrt{\frac{\pi_2(1-\pi_2)}{n_2}})^2} = \sqrt{\frac{\pi_1(1-\pi_1)}{n_1}+\frac{\pi_2(1-\pi_2)}{n_2}}[/tex]

The standard error is [tex]s = \sqrt{\frac{\pi_1(1-\pi_1)}{n_1}+\frac{\pi_2(1-\pi_2)}{n_2}}[/tex], in which [tex]p_1,p_2[/tex] are the proportions and [tex]n_1,n_2[/tex] are the sample sizes.

Answer:

21/4

Step-by-step explanation:

3sin²60 + cot²30​

sin 60 = √3/2

cot 30​ = √3

Substituting values in equation,

3(√3/2)² + (√3)²

=> 3(3/4) + 3

=> 9/4 + 3

=> 9/4 + 12/4

=> 21/4

Answer:

9/4x^2 - 6x +4

Step-by-step explanation:

( 3/2x-2)^2

(3/2x-2)(3/2x-2)

9/4x^2 - 3x - 3x +4

9/4x^2 - 6x +4

3/2 x 2 = 6/2 = 3

Step-by-step explanation:

( 3/2x-2)² = 9/4 x²- 6x +4

Answer:

The Pearson coefficient of skewness is of 0.8284.

Step-by-step explanation:

Pearson skewness:

The skewness of a data set is given by the subtraction of the mean by the median, divided by the standard deviation.

In this question:

The mean is of 87, the median is of 73 and the standard deviation is of 16.9. So

(87-73)/16.9 = 0.8284.

The Pearson coefficient of skewness is of 0.8284.

Answer:

59 tournament passes and 36 one-day passes were sold.

Step-by-step explanation:

Since the first day of a water polo tournament the total value of tickets sold was $ 1540, and one-day passes sold for $ 10 and tournament passes sold for $ 20, and the number of tournament passes sold was 23 more than the number of day passes. sold, to determine how many day passes and tournament passes were sold, the following calculation must be performed:

20 x 33 + 10 x 10 = 760

20 x 63 + 10 x 40 = 1,660

20 x 58 + 10 x 35 = 1,510

20 x 59 + 10 x 36 = 1,540

Thus, 59 tournament passes and 36 one-day passes were sold.

Answer:

On a plane

Step-by-step explanation:

Answer:

A plane

Step-by-step explanation:

Answer:

a₁₂ = 20971520

Step-by-step explanation:

The nth term of a geometric sequence is

[tex]a_{n}[/tex] = a₁[tex](r)^{n-1}[/tex]

where a₁ is the first term and r the common ratio

Here a₁ = 5 and r = a₂ ÷ a₁ = 20 ÷ 5 = 4 , then

a₁₂ = 5 × [tex]4^{11}[/tex] = 5 × 4194304 = 20971520

Answer:

y=2x-8 x=12 y=16

Step-by-step explanation:

the function is y=2x-8

if x=12

y= 2 (12)-8=16

Answer:

Step-by-step explanation:

The slope of line AB is

[tex]\frac{2-8}{3-(-3)} = \frac{-6}{6} = -1[/tex]

The slope of line CD is

[tex]\frac{-1-1}{5-7} = \frac{-2}{-2} = 1[/tex]

Since the slopes multiply to [tex]-1[/tex], these lines are perpendicular to one another.

The lines AB and CD are perpendicular to one another.

The slope is the ratio of the vertical changes to the horizontal changes between two points of the line.

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

where (x₁, y₁) and (x₂, y₂) are the two points that you are trying to find the slope between.

let (x₁, y₁ ) = A(-3,8), and (x₂, y₂ ) = B(3,2)

The slope of line AB is;

m =  ( y₂ - y₁ ) / ( x₂ - x₁ )

m = ( 2 - 8) / ( 3 +3 )

m = -1

let (x₁, y₁ ) =  C(7,1) and (x₂, y₂ ) = D(5,-1)

The the slope of line CD is;

m =  ( y₂ - y₁ ) / ( x₂ - x₁ )

m = ( -1 - 1) / ( 5 - 7 )

m = 1

Since slope of AB and CD are not equal the lines are not parallel therefore, these lines are perpendicular to one another.

Learn more about slope here:

https://brainly.com/question/2503591

#SPJ2

Answer:

Hello! answer: x = 15

Step-by-step explanation:

Here is a visual i created of what the complementary angle would look like!

Answer:

50

Step-by-step explanation:

32/0.64 = 50

Answer:

1st one is true, 2nd is true and 3rd is false

Step-by-step explanation:

Answer:8

is the answer

Answer: 7×4³

Step-by-step explanation:

Answer:

7 x 4³

Step-by-step explanation:

using exponents to my understanding,

the answer vis supposed to be;

7 x 4³

Answer:

6

Step-by-step explanation:

fog(x) = √3(x-6)

Domain => 3(x-6) ≥ 0

<=> x-6≥ 0

=> x ≥ 6

so, the smallest number is 6

As

(fog)(x)=f(g(x))

f(g(x))

So

Smallest no is 6