Solution :
Sampling may be defined as the technique of selecting the individual members or the subset of the population to make a statistical inferences and estimates the characteristics of the entire population.
There are several sampling methods. This includes : Systematic sampling, clustered sampling, stratified sampling, quota sampling, judgement sampling, random sampling, convenience sampling and many more.
In the context, the sampling methods for each of the descriptions are :
a). The researcher use computer program to randomly choose a sample of 30 mice of the 1000 mice for using her study
--- Simple Random
b). The researcher chose the 1st 30 mice as she can reach the door to the mouse room
--- Convenience sampling
c). The mice those whose are kept in the cages on 10 various shelves in mouse room. The researcher or the experimenter chose the three mice from each shelve.
---- Stratified sampling
d). Each of the cage have 5 mice and the researcher randomly chooses 6 cages for her study
----- Cluster sampling
e). The researcher generates the list of the identification numbers which has been sorted from the smallest to the largest. The researcher randomly picks 1 mouse form the list and selects every 4 mouse until the researcher has 30 mice.
---- Systematic sampling
Solve x4 - 11x2 + 18 = 0.
Answer:
x=√2, x=-√2, x= 3 and x=-3
Step-by-step explanation:
We need to solve the equation x^4 - 11x^2+18=0
We can replace x^4 = u^2 and x^2 = u
So, the equation will become
u^2 -11u+18 = 0
Factorizing the above equation:
u^2 -9u-2u+18 =0
u(u-9)-2(u-9)=0
(u-2)(u-9)=0
u=2, u=9
As, u = x^2, Putting back the value:
x^2 =2 , x^2 =9
taking square roots:
√x^2 =√2 ,√x^2=√9
x=±√2 , x = ±3
so, x=√2, x=-√2, x= 3 and x=-3
Answer:
The second answer is correct.
Step-by-step explanation:
Mark brainliest if correct please
3 + 2r = 5 so r = what
Answer:
r=1
Step-by-step explanation:
3+2r=5
-3 -3
2r=2
r=1
Answer: R equals 1. Move the constant to the right and change it's sign. Subtract the numbers. Divide both sides of the equation by 2. So that leaves you with 1.
if you play paintball for $8 for 30 minutes, how much will it cost you to play for 1 hour and 15 minutes?
please hurry! will give brainliest
Answer:
20
Step-by-step explanation:
30+30 is a hour and half of 30 is 15 so do this 8+8 and the add half of 8 and it is 4 so the full thing is 8+8+4+20
Do 1 and have the same value?
Are 12/15 and 8/10 have the same value
Answer:
Step-by-step explanation:
12=3*2*2
15=5*3
12/15=4/3
8/10=4/5
no, they don't have the same value
Translate the following into an algebraic expression: The product between -3 and the sum of 9 and a number, y.
Answer:
Step-by-step explanation:
(-3) x (9+y)=
Help please answer in the order of colors i will mark brainliest
Answer:
Try this site Bellow
Step-by-step explanation:
M A T H W A Y
no spaces and it's all one word
AREA OF A CIRCLE
r=3 cm
-2 + (-7) =
Help please
Answer:
That would be -5
Step-by-step explanation:
V is the midpoint of GH. G has coordinates (5, -3), and V has coordinates (-1, 3). Identify the coordinates of H.
Answer:
(-7,9)
Step-by-step explanation:
Please answer in only a fraction please..
Answer:
19/40
Step-by-step explanation:
1.9*(1/4) =0.475
0.475=19/40
Peggy jogged for 2 hours 12 minutes. How many total minutes did Peggy jog?
Answer:
132
Step-by-step explanation:
60 + 60 + 12 = 132
126=76
132=32
208=58
261=?
Answer:
dude I ain't no albert einstein but I think it's 61
Step-by-step explanation:
stay groovy man
For the given pair of equations, give the slopes of the lines, and then determine whether the two lines are parallel, perpendicular, or neither.
10x - 3y = 3
3x + 10y = 30
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. The slope of 10x - 3y = 3 is
(Type an integer or a simplified fraction.)
O B. The slope of 10x - 3y = 3 is undefined.
Answer/Step-by-step explanation:
Given,
10x - 3y = 3
3x + 10y = 30
Rewrite both equation in slope-intercept form, y = mx + b.
Where, m = slope of the line.
Thus,
✔️10x - 3y = 3
-3y = -10x + 3
y = 10/3x - 1
Slope of this line would be 10/3
✔️3x + 10y = 30
10y = -3x + 30
y = -3/10x + 3
The slope of this line is -³/10.
✔️The two lines are pendivukar to each other because the slope of one is the negative reciprocal of the other.
SOME ONE PLEASE PLEASE HELP!!!
Can 6,6 and 12 be the side lengths of a triangle
Answer:
no because the two smallest sides have to be bigger that the third side
Maliks decides to use some of her savings to buy a bicycle. She compares the price of 3 brands of bicycles: the RacerZ, the Speedmonster and the swiftee the speedmonster price is $64.80 the RacerZ is $20 less then 2.5 times the price of the speed monster the swiftee is 1.09 times the price of the RacerZ what are the prices of the RazerZ and the Swiftee? Show your work.
there are 12 students in a class who are preforming at the school concert . this represents 40% of the class how many students are in the class?
Answer:
There are 30 students in class
Step-by-step explanation:
Let x be the total number of students
Then according to the given statement,
40% of x is 12
this can be expressed mathematically as:
[tex]12 = 40\%\ of\ x\\12 = 0.40 * x[/tex]
we can simply use this equation to find the total number of students
[tex]12 = 0.40x[/tex]
Dividing both sides by 0.40
[tex]\frac{0.40x}{0.40} = \frac{12}{0.40}\\x = 30[/tex]
Hence,
There are 30 students in class
I GIVEEEEEE BRAINLILST
Answer:
c is (-8,-6)
d is (-8,10)
e is (-4,2)
:)
Answer:
C(-4,-3)
D(-4,5)
E(2,-4)
What is the solution to −10x−4≥−4(x−2) ?
Answer:
Step-by-step explanation:
Here you go mate
PEMDAS
Parenthesis
Exponents
Multiplication
Addition
Subtraction
Step 1
-10x-4≥-4(x-2) Equation/Question
Step 2
-10x-4≥-4(x-2) Remove parenthesis
-10x-4≥-4x+8
Step 3
-10x-4≥-4x+8 Simplify by adding 4x
-6x-4≥8
Step 4
-6x-4≥8 Subtract 4 from both sides
6x≥12
Step 5
6x≥12 Divide both sides by 6 or 3
answer
x≤-2
Is 4.259462364423... a rational or irrational number?
Answer:
Yes it its!!! It goes on for a long time!! Keep that in mind when you are doing problems like this!
:)
Step-by-step explanation:
Ron is planning for the back-to-school rush at his store. Last year he estimated that he would need 168 notebooks, but he sold 200 notebooks. Explain how Ron can find the percent error of his estimate.
Answer:
ਮੁਆਫ ਕਰਨਾ ਮੈਨੂੰ ਬਿੰਦੂ ਚਾਹੀਦੇ ਹਨ
Step-by-step explanation:
Answer:
9807654e6785e46754
Step-by-step explanation:
How many fluid ounces are there in 6 quarts?
Answer:
The answer is 192. Hope this helps!
Name a pair of vertical angles.Pls HELP
A. angles CED and DEF
B. angles CEB and BEA
C. angles BEA and EDF
D. angles FED and DEB
Answer:
It would be none of them technically.
I am unsure but it seems like C.
Janelle wrote the matrix addition below.
3
-1
n
-5
0
4.
1
-6
-
-1 -7
18
6
m-1 -9 +
O
-12 2+
4.
0
10
12
-4.
Il
17
S+1
7
1
-18 8
14
-11
5
32 -28 20
Which statement is true?
0 (n+4)- 7 = 18
O ((m-1)+12)+0= 12
o (5+1)-18)+11--28
On+(m-1)+(5+1)=-28
Answer:
5
Step-by-step explanation:
3
-1
n
-5
0
4.
1
-6
-
-1 -7
18
6
m-1 -9 +
O
-12 2+
4.
The correct matrix addition is (m -1) + (( -12) + 0) = 12 .
Option B is correct.
What is Matrix Addition?To add two or more matrices, the basic process is matrix addition. Matrix addition is only possible if the matrices are in the same order. By order, we mean that the matrices have the same number of rows and columns. As a result, we can add the matrices' appropriate elements. Matrix addition is not possible if the order is changed.
We will add the rows:
Addition of First row
n + (4 -7) = 18
Addition of Second row
(m -1) + (( -12) + 0) = 12
Addition of Third row
(s+ 18) + (-18 - 11)= -28
Learn more about Matrix addition here:
https://brainly.com/question/14490203
#SPJ7
Determine the value of x.
Question 15 options:
A) 33.33°
B) 56.67°
C) 50°
D) 45°
Answer:
X=50 hope this helps:)
Step-by-step explanation:
90+110=200
360-200=160
160=3x+10
150=3x
X=50
in a company, 60 of the workers are women. if 1560 people work for the company who aren't women, how many workers there in all
Answer:
1620 people in the company
Step-by-step explanation:
Just add all the workers together. 60 + 1560 = 1620.
Please help me please I beg u
Answer:
2 times larger
Step-by-step explanation:
Answer:
two.
Step-by-step explanation:
The circumference of a wheel is directly scaled to its radius. We're told that Kevin's tricycle wheel is eight inches in radius, and Monica's bicycle wheel is 16 inches in radius. Because 16 is equal to 2×8, we know that Monica's wheel is twice as big as Kevin's.
3) y = 4x + 24
y = x + 9
Answer:
x= -5
y= 4
Step-by-step explanation:
Substitute the equations for y
x+9=4x+24
Subtract x from both sides of the equation.
9=3x+24
Now subtract 24 from both sides of the equation.
-15=3x
x= -5
y= -5=9=4
3x -4y = 9
-5 + 4y= -23
Help ?
Answer:
here you go.
Step-by-step explanation:
it's it the picture. I hope it helps
Which line has an x-intercept of 4?
4x+y=8
-4x + y= 8
2x+ 2y = -8
-2x+2y= -8
Answer:
-2x+2y=-8
-2x+2(0)=-8
-2x=-8
x=-8/-2
x=4
(4,0)
=======================================================
Explanation:
If we plug in y = 0 and solve for x, we'll get the x intercept.
Doing so for choice A has us get
4x+y = 8
4x+0 = 8
4x = 8
x = 8/4
x = 2
So the x intercept is 2. We can rule out choice A
Through similar steps, choice B has an x intercept of x = -2, so we can rule that out as well.
Choice C leads to x = -4, so that's not the answer either.
Choice D has an x intercept of x = 4 since,
-2x+2y = -8
-2(4)+2(0) = -8
-8+0 = -8
-8 = -8
So that confirms choice D is the answer.