Answer:
To determine whether a sampling is random or biased, we need to know how the sample was selected. Here are three possible scenarios:
Ranger 1 stands at the entrance to the park and surveys the first 100 visitors who arrive.
This sampling is biased, as it only includes visitors who arrived early in the day. Visitors who arrive later in the day may have different characteristics or behaviors, so this sample may not be representative of all park visitors.
Ranger 2 selects every 10th visitor who enters the park and surveys them.
This sampling is random, as every 10th visitor is selected without bias. This method is called systematic sampling.
Ranger 3 surveys visitors who are leaving the park on a rainy day.
This sampling is biased, as visitors who come to the park on a rainy day may have different motivations or behaviors than visitors on a sunny day. This sample may not be representative of all park visitors.
In summary, sampling methods that are random, such as systematic sampling, are preferred over biased sampling methods in order to obtain a representative sample of the population of interest.
Answer: Depending on the situation
Step-by-step explanation: For a sample to be random, everyone/thing has to have an equal chance of getting selected. Ex. One of the park rangers asked everyone in one part of the park. - This example would be biased because the people who weren't in that part of the park had less of a chance of being picked
Find the slope of the line of fit and explain its meaning in the context of the data.
80; a student who studies for 0 hours is predicted to earn 80% on the test
60; a student who studies for 0 hours is predicted to earn 60% on the test
10; for each additional hour a student studies, their grade is predicted to increase by 10% on the test
5; for each additional hour a student studies, their grade is predicted to increase by 5% on the test
Helppppp :((( im very lostt
Answer: Moving 4 units left
Step-by-step explanation: All you have to do is pick a point
keep the same y-coordinate. Subtract 4 from your x-coordinate.
Check if number one is correct and do the rest for me please. Put the way you got it too.
Answer:
A = 1792.44
Step-by-step explanation:
Area of Trapezoid formula is:
A = 1/2(b1 + b2)h
A = 1/2(92+61.2)23.4
A = 1/2(153.2)23.4
A = (76.6)*23.4
A = 1792.44
Question is in the picture
I need this really quick
Answer:
4 3/8
Step-by-step explanation:
-2 1/2 * -1 3/4
-5/2 * -7/4
35/8
4 3/8
Hope this helps!
HELP ASAP PLEASSEEEE
Answer:
-2
Step-by-step explanation:
Answer: -2
Step-by-step explanation: 5 x 2 = 10
5 x -2 = -10
-5 x 2 = -10
Basically reverse the process with division, if there is one negative the answer will be negative.
5 Figure N is a rectangular prism that has twice the volume of figure M. How many layers and how many cubes in each layer could there be in figure N?
The number of layers of M and in N in 2
How many layers and how many cubes in each layerWe do know that Figure N has twice the volume of Figure M. Since both figures are rectangular prisms, their volumes can be calculated using the formula:
Volume = length x width x height
Let's say that Figure M has a length of L, a width of W, and a height of H.
Then its volume is:
Volume_M = LWH
Since Figure N has twice the volume of Figure M, we can write:
Volume_N = 2 x Volume_M
Substituting the formula for Volume_M, we get:
Volume_N = 2LWH
This means that two layers of M and in N
The number of cubes cannot be determined with the available information
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Suppose instead that one friend bought all 4 bags of pretzels and another friend bought all 4 drinks write an expression that shows the total cost
Answer:
4x+4y=total cost
Step-by-step explanation:
We are given that there was a total of 4 bags of pretzels and 4 drinks bought. We are also given to write an expression using x dollars for the pretzels and y dollars for the drinks.
To do this, we need to multiply the cost of each pretzel bag, x, by the total amount of bags of pretzels purchased.
4·x
=4x
Next, we need to multiply the cost of each drink, y, by the total number of drinks purchased:
4·y
=4y
The question is asking us to write an expression, so put 2 and 2 together:
4x+4y=total cost
Given the actual question, "Suppose instead..." the expression would be the same.
Hope this helps! :)
need help on this mapping
Answer:
The answer is C
Step-by-step explanation:
The way my teacher helped us remember it last year was if Y repeats she is a cheater and breaks the function.
Thank you for your help! :D
The number of times Maria drove the car on day 4 is 7 times.
How many times did Maria drive her car on day 4?A line graph is a graph that connects different data points on a graph using a straight line. A line graph is made up of a x-axis and a y-axis. In the line graph given, the number of days is on the x-axis and the number of times the car was driven is on the y-axis. A line graph is used to show quantitative data. Line graphs are used to visualise data.
In order to determine the number of times Maria drove the car on day 4, locate where day 4 is on the x-axis. Then trace 4 upward toward a data point. When the data point is located, trace it to the y-axis. When day 4 is traced to the y-axis, the value gotten is 7.
To learn more about line graphs, please check: brainly.com/question/27252279
Answer:
She drove her car 7 times on day 4.
Step-by-step explanation:
The left column is how many times she drove her car and on day 4, the yellow dot is on line 7.
What integer makes the following subtraction sentence true?
-1 - __ = -7
Answer:
-6 or in your case since the negative sign is present 6
Step-by-step explanation:
-1-6=-7
Answer:
6
Step-by-step explanation:
-1 - x = -7
add 1 to both sides
-x=-6
divide both sides by -1
x=6
So, the integer that would make this statement true is 6. Hope this helps! :)
Please answer it asap (it's due tomorrow), What is 0.99 ÷ 11? Show your work.
What is 5.12 ÷ 4? Show your work too. (Thanks if you helped :) )
Answer:
1. 0.9 is the answer
2. 1.28
Step-by-step explanation:
0.99÷11=99/100÷11/10=99/100x10/11=9/10=0.9
2.expand 5.12/4 by multiplying both numerator and the denominator by 100 512/400 reduce the fraction 512/400 to lowest terms by extracting and canceling out 10 32/25 for factor 2 5/5 2=1 7/25=1.28
Answer:
0.99÷11=0.09 5.12÷4=1.28
help please:( (10 points only because I have 25)
HELP PLS 50 PTS
A 25-foot magazine rack begins 20 feet south of the checkout desk and continues south. What are the coordinates of the beginning and end of the magazine rack? Explain or show how you got your answer. ANSWER CORRECTLY WITH AN EXPLANATION
Answer:
I'll make this as fast as possible
(5,-20)
Step-by-step explanation:
Triangle XYZ is drawn with vertices X(1, 2), Y(2, 5), Z(3, 4). Determine the translation direction and number of units if Z′(9, 4).
6 units down
6 units up
6 units to the right
6 units to the left
Answer:
(c) 6 units to the right
Step-by-step explanation:
You want to know the translation amount and direction that moves ∆XYZ to ∆X'Y'Z', where Z=(3, 4) and Z'=(9, 4).
TranslationThe translation vector can be found from the difference ...
Z' -Z = (9, 4) -(3, 4) = (6, 0)
The translation is 6 units right and 0 units up or down.
The direction and number of units is ...
6 units to the right, choice C.
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Question 8!!
Total area= area of rhombus + area of triangle
Answer:
total area of the given figure is 126
step by step guide:
1) 14×6+1/2×14×6
2) 84+42
3) =126
can someone please help me i dont understand
The tape diagram represents an equation. Write an equation to represent the image.
Answer: 6t = 9
Step-by-step explanation:
What is visually explicable is that the 2 tape diagrams are equal.
One tape diagram equals 9, one is divided into 6 equal parts, each equals t.
6t's make up a diagram that is equal to a diagram equal to 9.
therefore 6t=9
Which number sentence is true?
Answer: D for Q 1. A for Q 2.
Step-by-step explanation:
Answer:
Step-by-step explanation:
-7 2/6>-13
is true because when u calculate the denominator by the numerator its the only real number
i've been stuck on this page for a while..
so i'm almost done this assignment but i cant figure out why this graph is misleading cause it looks accurate to me
help
Answer:
See below.
Step-by-step explanation:
a) $81235 - $15405 = $65830
b)
1) The graph uses cubes to represent the amount of sales.
2) I wonder if the amount of sales is proportional to the length of the side of the cube or to the volume of the cube.
c)
Using a ruler, the Year 1 cube has side length 5 units.
Using the same ruler, the Year 5 cube has side length 18 units.
The volume of the Year 5 cube is 5832 units³. The volume of the Year 1 cube is 125 units³.
The ratio of the volumes of Year 5 cube to the Year 1 cube is
5832/125 = 47:1
The ratio of sales of Year 5 to Year 1 is
81235/15405 = 5:1
The sales of Year 5 are approximately 5 times the sales of Year 1, tbut the cube of Year 5 has approximately 47 times the volume of the cube of Year 1. The graph is misleading because the volumes of the cubes are not proportional to the amounts of sales.
d) 47 times in volume
The diameter of Circle A is 8 inches. The diameter of Circle B is 4 inches greater than the diameter of Circle A. The diameter of Circle C is 4 inches greater than the diameter of Circle B.
a. What is the area of each circle? Use 3.14 for π.
b. How many times greater is the area of Circle C than the area of Circle A?
Answer
circle a= 25.2
circle b= 37.68
it is 1/2 times greater
Step-by-step explanation:
theta is a right angled triangle theta = tan-1(0.43) work out the value of theta give your answer to 1 decimal place
Answer: 23.3 deg
Step-by-step explanation:
if theta = tan-1(0.43), then theta is about 23.3
Answer:
23.3 deg
Step-by-step explanation:
Julie's remote control helicopter rises 15 feet in 20 seconds. what is the rate of rise in feet per hour ?
Answer:
Step-by-step explanation:
2700 feet/hour
Kyle has a storage box that is 2 ft. long, 3 ft. high, and has a volume of [tex]12ft^{3}[/tex]
Myla has a storage box that is 4 ft. high, 2 ft. long, and has a volume of [tex]16ft^{3}[/tex]
What are the widths of Kyle and Myla's boxes? Explain how you know.
help please! and please have easy explanation that's easy to understand :))
Answer:
OK so, volume= length x width x height
so, if the length of kyles box is 2, and his height is 3, but the volume is 12, then the width would be 2.
2 x 2 x 3=12
however, for myla, if her box is, 2 feet long and 4 feet high, but the volume is 16, then, her width is also 2.
2 x 2 x 4= 16
a way to look at this is, in the problem you are given the height and length, so, if its length times width times height, take your given length and multiply it by a number that will make it equal your given volume.
for example, let q=width, let m=height, and let j=length, p=volume, h=random variable.
j (x) h (x) m=p
its your job to find h.
hope this helps!
Step-by-step explanation:
Brianna has a decision to make on where to attend college after high school. She has a choice of living at home and attending the local junior college or attending a four-year university. She created a table to help her and her parents make the decision. The table contains the estimated costs for each semester.
At Junior College At Four-Year University
Tuition and Fees $1,800 $2,625
Room and Board $0 $3000
Transportation Costs $1000 $0
Books and Supplies $700 $700
Personal Expenses $600 $600
How much would she save the first year by attending the local junior college?
Answer: I think it would be $2825
Step-by-step explanation:
Add all of the Junior College fees and then add all of the 4-year college fees and then subtract them to find your answer.
how to check : 3x+5=11
Answer:
There are two ways to check if 3x+5=11 is true:
Subtract 5 from both sides of the equation. This will isolate x on the left-hand side of the equation.
3x = 6
Divide both sides of the equation by 3. This will divide both sides of the equation by 3, which will cancel out the 3 on the left-hand side of the equation, leaving x by itself.
x = 2
You can also check if 3x+5=11 is true by plugging in 2 for x. If you do this, you will get 3(2)+5 = 6+5 = 11. Therefore, 3x+5=11 is true when x=2.
tan theta = 28/47 give your answer in 1 dp
The value of theta in tanФ = 28/47 is 30.75° .
Given,
tanФ = 28/47
Here,
tanФ in right angled triangle measured by,
tanФ = P/B
P = perpendicular
B = base
Here,
tanФ = 28/47
Take inverse of tan to obtain the value of Ф .
Ф = [tex]tan^{-1}[/tex] (28/47)
Ф = 30.75° .
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HELPPPPPP PLSSS DUE TMRW
Answer:
13
13
Step-by-step explanation:
-7+6= 7+6= 13
-7+6= 7+6= 13
The graph of y = f(x) is shown in the attached image.
For each point (a,b) that is on the graph of y = f(x), the point (2a +1, 3b) is plotted, forming the graph of another function y = g(x). As an example, the point (0,2) lies on the graph of y = f(x), so the point (2*0 + 1, 3*2) = (1, 6) lies on the graph of y = g(x).
I need help expressing g(x) in terms of x and describing the transformations that can be applied to the graph of y = f(x) to obtain the graph of y = g(x). I would like an explanation.
The calculated expression of function g(x) in terms of x is g(x) = 3f((x-1)/2)
Expressing the function g(x) in form of xTo express g(x) in terms of x, we need to use the relationship given between the points on the graph of y=f(x) and the corresponding points on the graph of y=g(x).
Specifically, if a point (a,b) is on the graph of y=f(x), then the point (2a+1,3b) is on the graph of y=g(x).
Using this relationship, we can write:
g(x) = 3f((x-1)/2)
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Use the values below to work out the values that complete the formula. Give any decimals to 2.d.p.
Answer:
Step-by-step explanation:
65