The question is incomplete. Here is the complete question.
For each situation identify which sampling method should be used. (simple random, stratified, cluster or systematic sample)
(a) A farmer has 44 plots of land for growing corn. He is concerned that the variation in yield between plots will vary but not within plots.
(b) Out of the 18 sections of Calculus, the chair of the math department randomly selected 4 sections. He then gives students in two of the four sections a paper exam, while the other two sections receive an online exam. Scores were then compared.
(c) A class of 250 students is numbered form 1 to 250 and a table of random digits is used to choose 55 students from the class. What type of sampling is used to select the group of students?
(d) In a factory producing television sets, every 100th set produced is inspected.
Answer and Step-by-step explanation:
Situation in (a) is called Cluster, where researchers divide the population into multiple groups. They analyze a sample of multiple sample parameters. The method is used when the groups that are internally different but are very similar form a population.
Situation in (b) is the method called Stratified, in which, a researcher finds difficult to analyse an entire population. So he/she divides this population into homogenous groups called strata (or stratum for plural) Fform each subgroup a random sample is selected.
Situation in (c) is the Sample Random: every item in the entire population has the same chance of being selected to create a sample.
Situation in (d) is the Systematic Sample, in which the sample is selected according to a starting position with a fixed periodic interval, as described in the situation.
What is the first step when rewriting y = –4x2 + 2x – 7 in the form y = a(x – h)2 + k?
Answer: it might be D
Step-by-step explanation: I think so on edge -4 must be factored from -4x^2-7
Answer:
It Is actually B just took the test
Step-by-step explanation:
Complete the work to solve for y: 2 5 ( 1 2 y + 5 ) − 4 5 = 1 2 y − 1 + 1 10 y
Answer:
11/2
Step-by-step explanation:
Just took the assignment on edge 2020
1
Mario has to buy oranges at the grocery store. Oranges cost $1.15 per pound.
How much will Maria spend on oranges?
Dependent variable:
Independent variable:
Equation:
Answer:
Dependent variable: Amount of oranges ([tex]y[/tex]), measured in pounds.
Independent variable: Money ([tex]x[/tex]), measured in US dollars.
Equation: [tex]y = 1.15\cdot x[/tex]
Step-by-step explanation:
According to the statement, Maria pays money to buy oranges at the grocery and there is a direct proportionality between money ([tex]x[/tex]), measured in US dollars, and the amount of oranges ([tex]y[/tex]), measured in pounds. That is:
[tex]y \propto x[/tex]
[tex]y = k\cdot x[/tex]
Where [tex]k[/tex] is the proportionality constant, measured in US dollars per pound.
The dependent variable is the amount of oranges ([tex]y[/tex]), whereas money ([tex]x[/tex]) represents the independent variable. If we know that [tex]k = 1.15\,\frac{USD}{pd}[/tex], then the equation is:
[tex]y = 1.15\cdot x[/tex]
In a nutshell, the answer is:
Dependent variable: Amount of oranges ([tex]y[/tex]), measured in pounds.
Independent variable: Money ([tex]x[/tex]), measured in US dollars.
Equation: [tex]y = 1.15\cdot x[/tex]
Over the last 6 months, Josh wrote 6 checks for a total of $702 to pay his phone bill. His phone bill is the same amount each month. What was the change in Josh’s bank account balance each month after paying his phone bill?
A) $117
B) $702
C) −$117
D) −$702
Answer:
C
Step-by-step explanation:
702divded by 6=117
hes taking away
Answer:C
Step-by-step explanation:702 divided by 6 is 117 he is paying 117 each month so he is taking $117 out of his account so -$117
in a bag of marbles there are 8 red 4 blue and 2 green. the ratio of green to red marbles is 1 to ___
Answer:
for every green marble, there is 4 red ones
the ratio is 1 to 4
The average distance of Mercury from the Sun is 36 million miles. The distance varies by 7.5 million miles.
Use this information to complete this statement.
The minimum distance of Mercury from the Sun is ___ million miles, and the maximum distance is ___ million miles.
Answer:
The minimum distance of Mercury from the Sun is
28.5
million miles, and the maximum distance is
43.5
million miles.
Step-by-step explanation:
its the right answer
you add or subtract 7.5 from 36 to get the minimum and maximum because thats the distance from 36 that it varies
Answer:
#1. 28.5
#2. 43.5
Mark for Review
2 A plece of paper was dropped from the top of a tall building. The height of the plece of paper above the
ground can be found using the function y = -2.5x + 30, where x is the time in seconds the plece of paper
has been in the air.
11
20
15
10
5
17 18 2017 2016
-10
-15
-30
How many seconds did It take the plece of paper to reach the ground?
Record your answer and fill in the bubbles on your answer document.
Answer:
12 seconds
Step-by-step explanation:
Given
[tex]y = -2.5x + 30[/tex]
Required
Determine the time taken to reach the ground
For the paper to reach the ground, y = 0
So, we have:
[tex]y = -2.5x + 30[/tex]
[tex]0 = -2.5x + 30[/tex]
Collect Like Terms
[tex]2.5x +0 = 30[/tex]
[tex]2.5x = 30[/tex]
Divide through by 2.5
[tex]2.5x/2.5 = 30/2.5[/tex]
[tex]x = 30/2.5[/tex]
[tex]x = 12[/tex]
Hence:
Time taken is 12 seconds
Please help! Please show all work! Thx!
Answer:
Part A)
[tex]86=2(x+22)[/tex]
Part B)
[tex]l=26\text{ cm}[/tex]
Step-by-step explanation:
We know that the rectangle has a length of (x+5) and a width of 12 cm.
Part A)
Remember the formula for the perimeter of a rectangle:
[tex]P=2(l+w)[/tex]
We know that the perimeter is 86. Substitute that for P:
[tex]86=2(l+w)[/tex]
Substitute (x+5) for the length l and 17 for w. So:
[tex]86=2((x+5)+17)[/tex]
We can simplify this to acquire our equation:
[tex]86=2(x+22)[/tex]
Part B)
To find the length, let's find our x first. We have the equation:
[tex]86=2(x+22)[/tex]
Divide both sides by 2:
[tex]43=x+22[/tex]
Now, subtract 22 from both sides. Therefore, our x is:
[tex]x=21[/tex]
To find the length, remember that the length is:
[tex]l=x+5[/tex]
Since we now know the value of x, substitute 21 for x:
[tex]l=21+5[/tex]
Add:
[tex]l=26\text{ cm}[/tex]
So, the length is 26 centimeters.
And we're done!
I NEED HELP PLEASE!!
Answer:
ACE
Step-by-step explanation:
jaelyn drew a figure whose area was 12 square units
Answer:
3
Step-by-step explanation:
20 POINTS! ASAP PLS! Show work!!
Hi there.
4th quadrant.Recall that:
csc θ = 1 / (sin θ) - deals with y-values
sec θ = 1 / (cos θ) - deals with x-values
If csc θ < 0, then the y-coordinate of the angle must be negative.
If sec θ > 0, then the x-coordinate of the angle must be positive.
The quadrant on the coordinate plane that consists of negative y-coordinates and positive x-coordinates is the 4th quadrant.
Answer:
QIV
Step-by-step explanation:
To answer this question, we can use the standard ASTC acronym.
This stands for: All Students Take Calculus.
The first letter of each word tells us what is positive in each quadrant.
So, in QI, all trig ratios are positive.
In QII, only sine ( and cosecant) is positive.
In QIII, only tangent (and cotangent) is positive.
And in QIV, only cosine (and secant) is positive.
We know that csc(θ)<0. In other words, csc(θ) is negative.
Since csc(θ) is negative, sin(θ) is also negative.
So, our θ can't be in QI or QII.
We also know that sec(θ) is positive.
Our θ can only either be in QIII or QIV.
In QIII, only tangent is positive, so cosine will be negative.
So, θ is not in QIII.
So, the only choice that remains is QIV. And cosine and secant are indeed positive in QIV.
So, our angle θ is in QIV.
And we're done!
The answer selected is wrong, so i need help asap :(
Answer:
The first answer,3(-3),i think
Step-by-step explanation:
hope this helps,tell me if its wrong or right,i just want to know
Answer:
3(-3)
Good luck
If the masses of the two objects stay the same, what must be done to reduce to gravitational force between them?
a. You must change the Gravitational constant
b. You must increase their distance from each other. (THIS ANSWER IS CORRECT)
c. You must change the material the objects are made of
d. You must give the objects an electric charge
Answer: b
Step-by-step explanation:
(So the answer doesn’t removed)
HELP PLEASE
Choose a number from 1-50 at random. What is the probability that it is either divisible by 5 or divisible by 7?
the answer is 8/25
to get this answer i thought of all of the numbers divisible by 5 or 7 to 50 and i got 16 numbers (5,7,10,14,15,20,21,25,28,30,35,40,42,45,49,50)
i got the fraction of 16/50 then i simplified it to get 8/25 hope this helps
Jamal's goal is to raise $600 for the food bank. So far, he has raised $267. How much more does he need to reach his goal?
Answer:
$333
Step-by-step explanation:
$600 - $267
Rewrite as a simplified fraction
The elevations of four locations are shown in the table, which statement is true
Answer:
its 5
Step-by-step explanation:
because if u dived your elavation bt times the equstin u get 5
evaluate
6*7-3^2*9+4^3
Answer:
42-9×9+64
=42-81+64
= 106-81
=25
Find the digit that makes 3,80_divisible by 8.
A. 2.
B. 0. C. 4. D. 6.
Answer:
B,0
Step-by-step explanation:
3,802 divided by 8= 475.25
3,804 divided by 8= 475.5
3,806 divided by 8= 475.75
And 3800 divided by 0=475
I hope this helps ;p
Help! This is confusing and I don’t know how to do it. Thanks.
Answer:
reflection
Step-by-step explanation:
because the image of the car converted upside down in a vertical manner.
Roberto Alberto rode his bike three-fourths of a mile 3 days in a row. He thinks he rode somewhere
between 2 and 3 miles.
A) Use the number line to show if Roberto Alberto is right or wrong.
Is 11/2 greater than 4/8?
Answer:
yes it's
Step-by-step explanation:
11/2 is greater than 4/8
The figure below shows a rectangular parking lot.
83 yd
62 yd
Answer:
Area= 5,146 yds Perimeter= 290 yds
Step-by-step explanation:
If you are finding the area it's 5,146 yards. And if you are finding the perimeter, it's 290. Hope this helped
5 hand sanitizers for $8. How much for 1?
I got 16 but I did not make sense to me
Answer:
1.60$ for each 1
Step-by-step explanation:
8 / 5 =
(a) Find the average and SD of the list 41, 48, 50, 50, 54, 57.
(b) Which numbers on the list are within 0.5 SDs of average? within 1.5 SDs of average? 2.
(a) Both of the following lists have the same average of 50. Which one has the smaller SD, and why? No computations are necessary. (i) 50, 40, 60, 30, 70, 25, 75 (ii) 50, 40, 60, 30, 70, 25, 75, 50, 50, 50
(b) Repeat, for the following two lists. (i) 50, 40, 60, 30, 70, 25, 75 (ii) 50, 40, 60, 30, 70, 25, 75, 99, 1
Answer:
1a) Mean = 40
Standard Deviation = 5
b)i Which numbers on the list are within 0.5 SDs of average?
48, 50, 50
ii) within 1.5 SDs of average?
48, 50, 50, 54, 57
2a)Both of the following lists have the same average of 50. Which one has the smaller SD, and why? No computations are necessary.
The list with the smaller S.D = (ii) 50, 40, 60, 30, 70, 25, 75, 50, 50, 50
This because the results obtained from the second list (ii) is close to the mean , therefore, the Standard deviation is small.
b) Repeat, for the following two lists.
The list with the smaller S.D = (i) 50, 40, 60, 30, 70, 25, 75
This because the results obtained from the second list (i) is close to the mean , therefore, the Standard deviation is small.
Step-by-step explanation:
1a) Find the average and SD of the list 41, 48, 50, 50, 54, 57.
Average (Mean) = Sum of terms/Number of terms
= 41+ 48 + 50 + 50+ 54 + 57/6
= 300/6
= 50
Standard Deviation for the population= √(x - Mean)²/n
=√ (41 - 50)²+ (48- 50)² + (50- 50)² +(50- 50)² + (54 - 50)² +(57- 50)²/6
= √81 + 4 + 0 + 0 + 16 + 49/6
= √150/6
= √25
= 5
(b) Which numbers on the list are within 0.5 SDs of average?
Mean ± Standard deviation × 0.5
50 ± 5 × 0.5
50 - 2.5
= 47.5
50 + 2.5
= 52.5
The numbers on the list are within 0.5 SDs of average are number within 47.5 and 52.5 : 48, 50, 50
ii) Within 1.5 SDs of average?
Mean ± Standard deviation × 1.5
50 ± 5 × 1.5
50 - 7.5
= 42.5
50 + 7.5
= 57.5
The numbers on the list are within 1.5 SDs of average are numbers within 42.5 and 57.5: 48, 50, 50, 54, 57
2 (a) Both of the following lists have the same average of 50. Which one has the smaller SD, and why? No computations are necessary.
(i) 50, 40, 60, 30, 70, 25, 75
Mean is already give as 50
Standard Deviation = √(x - mean)²/n
= √(50 - 50) + (40- 50)² (60 -50)² +(30- 50)² + (70 - 50)² + (25 - 50)² (75 - 50)² /n
= √0 + 100 + 100 + 400+ 400 + 625 + 625/7
= √2250/7
= √321.4285714
= 17.92842914
(ii) 50, 40, 60, 30, 70, 25, 75, 50, 50, 50
Standard deviation = √(x - mean)²/n
√(50 -50)²+(40-50)² + (60 -50)²+ (30-50)² + (70 - 50)²+ (25-50)² +(75-50)² + (50 -50)² + (50 - 50)²+(50 - 50)²/10
= √0 + 100 + 100 + 400 + 400 + 625 + 625 + 0 + 0 + 0/10
√2250/10
√225
= √15
The list with the smaller S.D = Second list (ii) 50, 40, 60, 30, 70, 25, 75, 50, 50, 50
This because the results obtained from the second list (ii) is close to the mean , therefore, the Standard deviation is small.
(b) Repeat, for the following two lists.
(i) 50, 40, 60, 30, 70, 25, 75
Mean is already give as 50
Standard Deviation = √(x - mean)²/n
= √(50 - 50) + (40- 50)² (60 -50)² +(30- 50)² + (70 - 50)² + (25 - 50)² (75 - 50)² /n
= √0 + 100 + 100 + 400+ 400 + 625 + 625/7
= √2250/7
= √321.4285714
= 17.92842914
(ii) 50, 40, 60, 30, 70, 25, 75, 99, 1
Standard Deviation = √(x - mean)²/n
= √(50-50)² +( 40 -50)² +( 60 - 50)² + (30 - 50)²+( 70 - 50)² + (25 - 50)² + (75 - 50)² +(99 - 50)² +(1 -50)²/9
= √0 + 100 + 100 + 400 + 400+ 625 + 625 + 2401 +2401/9
= √7052/9
= √783.5555556
= 27.99206237
The list with the smaller S.D = (i) 50, 40, 60, 30, 70, 25, 75
This because the results obtained from the first list(i) is close to the mean , therefore, the Standard deviation is small.
A physical education class is running a mile. The teacher has set a goal of 12 minutes to complete the mile. Students receive a score to show how close they are to the target of 12 minutes. For example, if students run the mile in 8 minutes, their scores will be -4. Complete the statements about the students’ scores.
Answer:
10, 1, 0 in that order hope this helps can i have branliest plz
Step-by-step explanation:
I took it and I got it right on edg
Answer:
give that guy brainliest plz
Step-by-step explanation:
look at the multipication in the box.
use the same integers to write down two divisions
Answer:
-30 ÷ 6= -5
-6 × 5 = -30
-30 ÷ -5 = 6
Step-by-step explanation:
c-x=d-d-r-cr solve for x how do i get the x alone? all these problems i have leave it as -x=
Answer:
x= r+cr+c
Step-by-step explanation:
Statement l Reason
----------------------------------------------------------------------------------------------------------------
c-x= d-d-r-cr l Given
----------------------------------------------------------------------------------------------------------------
-x= d-d-r-cr-c l Subtraction: First you need to subtract c from both sides
----------------------------------------------------------------------------------------------------------------
-x= -r-cr-c l Combine like terms
----------------------------------------------------------------------------------------------------------------
x= r+cr+c l Divide: You need to divide by negative one on both sides
Pls help me with 4 , 5 , and 6 and show me how you did it i will mark brainlist !!
Answer:
2 on top and bottom of 4 5 is 3 on top and bottom and lastly 6 is 8 on top and bottom.
Step-by-step explanation:
all you have to do is divide the two bottom numbers on each problem and the answer to the problem will be the same on top and bottom
The equation y = 7x represents a proportional relationship. What is the constant of proportionality?
A. 0
B. x
C. 7
D. 1/7
Answer: c. 7
Step-by-step explanation: it’s 7. I got that answer
Answer:
it is 7
Step-by-step explanation:
i got it right on quiz
