Consider a situation in which sampling without replacement is used to generate a random sample from each of two separate populations. To calculate a confidence interval to estimate the difference between population proportions, which of the following checks must be made?
Answer:
Each population must be at least 10 times as large as its corresponding sample.
Step-by-step explanation:
The 10 percent rule checks that the sample is small relative to the population (that is, that the population is at least 10 times as large as the sample size) so that independence of observations within a sample is reasonable to assume.
The check that must be made is (b) Both population must be approximately normal
From the question, we have the following highlights
The sampling is without replacementThere are separate populationsWhen the above highlights are true, then the population where the samples are to be selected must be approximately normal
Hence, the check that must be made is (b) Both population must be approximately normal
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Monique works for h hours as a lifeguard this week, earning $12 per hour she also earns $20 for dog city which expression represents how much money Monique will make this week
The total money earned by Monique can be written as a expression as 12h + 20.
What is an Algebraic expression?An algebraic expression can be obtained by doing mathematical operations on the variable and constant terms.
The variable part of an algebraic expression can never be added or subtracted from the constant part.
The earning per hour working as lifeguard is $12.
And, the earning from dog city is $20.
Suppose the number of hours worked as lifeguard be h.
Then, the money earned working as lifeguard is 12h.
Now, the expression for total money earned can be given as,
12h + 20
Hence, the expression for the total earning can be given as 12h + 20.
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EASY PLS HELP ASAP!!
ANY QUESTION PLSSS
I am in desperate need of help
I will give out as many points as I can
please tell me where to place them
Wait...
This is map!
U are not supposed to be cheating in MAP!
A local grocery delivery time has a uniform distribution over 15 to 65 minutes. What is the probability that the grocery delivery time is more than 20 minutes on a given day
Answer:
The probability is 0.9
Step-by-step explanation:
We start by calculating the density function
That will be;
f(x) = 1/(b-a)
b and a are the extremes
from the question,
a = 15
b = 65
So f(x)
= 1/(65-15) = 1/50 = 0.02
The probability we want to calculate is;
P( x > 20)
The termination point is 65
So the probability will be
(65-20) * 0.02
= 0.9
Write an exponential function for each set of points.
(0 , 1024), (1,256), (2,64). (3 , 16) and (4 ,4)
Answer:
[tex]f(x)=(\frac{1}{4})^{x-b}[/tex]
Step-by-step explanation:
We are given that
(0,1024),(1,256),(2,64),(3,16)and(4,4)
From given data we assume an exponential function
[tex]f(x)=a^{b+x}[/tex]
where b and a are constant
[tex]f(0)=1024[/tex]
[tex]1024=a^b[/tex]...(1)
[tex]f(1)=256[/tex]
[tex]256=a^{b+1}[/tex]...(2)
Equation (1) divided by equation (2)
Then, we get
[tex]\frac{1024}{256}=\frac{a^{b}}{a^{b+1}}[/tex]
[tex]4=a^{-1}[/tex]
[tex]a=\frac{1}{4}[/tex]
Using the the value of a in equation (1)
[tex]1024=(\frac{1}{4})^{b}[/tex]
[tex]4^{5}=4^{-b}[/tex]
[tex]-b=5[/tex]
[tex]b=-5[/tex]
Therefore, the exponential function
[tex]f(x)=(\frac{1}{4})^{x-b}[/tex]
I don’t know this question what is 1/7 • 5/2=?
Answer: what does the dot mean?
Step-by-step explanation: 5/14
Boat :$23,500 , 12.5% off what is the discount and selling price?
!!!!! PLEASE HELP ME !!!!!
Find the standard equation for the circle with center on the negative y -axis and passing through the origin with radius of 3.
A. x^2 + y^2 = 9
B. (x + 3)^2 + y^2 = 9
C. x^2 + (y + 3)^2 = 9
Answer:
The correct option is C : x² + (y +3)² = 9 .
Step-by-step explanation:
We know that the general equation for a circle is ( x - h )² + ( y -k )²= r², Where,
r is the radius.(h , k) is the center.Let the point be ( 0 , -y) , since it is on negative y axis . And the circle passes through the origin that is (0,0) . Hence the center will be 3 units down the y - axis that is ( 0 , -3) .Hence h will be 0 and y = (-3) .
Now its given that the radius of the circle is 3. So on substituting r = 3 , in standard form we have ,
⇒ ( x -h )² + ( y - k )²= r²
⇒ ( x - 0)² + { y - (-3) }² = 3²
⇒ x² + ( y + 3) ² = 3²
⇒ x² + ( y + 3)² = 9
Hence the correct option is C [ x² + ( y+3)² = 9 ] .Note that I have attached the graph of the same .
Which expression is equivalent to 5x+10y-15?
5(x-2y-3)
5(x +5y-10)
5(x+2y-3)
5(x+2y-15
Answer:
b
Step-by-step explanation:
please give me the right answer and help i’ll give you brailiest❤️
Answer:
1 : 3
Step-by-step explanation:
¼ of the biscuits are chocolate while the rest are plain.
Since a fraction is a part of a whole, 1, then it means that the fraction that are plain is:
1 - ¼ = ¾
Therefore, the ratio of chocolate biscuits to plain biscuits is:
¼ : ¾
To put this in simplest dorm, multiply both sides by 4, we have:
1 : 3
This is the ratio of chocolate biscuits to plain biscuits.
Answer: does it mean like 1/4 and 3/4 plz dont delete and plz tell me if im wrong
Step-by-step explanation:
PLEASEE HELPppp. Will give brainliest :)))))) Enter the coordinates of the vertices of (r(180°, O) ∘ T⟨3, –2⟩)(QRST).
Answer:
(x, y) → (-x, -y)
Q"(4, 1) → Q'(-4, -1)
R"(6, -5) → R'(-6, 5)
S"(3, -4) → S'(-3, 4)
T"(1, -1) → T'(-1, 1)
Step-by-step explanation:
this might be right, sorry if im wrong
Answer:
q - (1,3)
r - (4,-3)
s - (0,-2)
t - (-2, 1)
hope that helpsss <3
Give the digits in the ones place and the hundredths place.
74.12
Answer:
The digit in the ones place is 4 and the digit in the 100ths place is 2
Step-by-step explanation:
SLOVE AND SHOW Steps
PLSSSSS
ASAP
Answer:
Step-by-step explanation:
look at the image
hope this helps
a) what is the class size?
b) which age group has the least number of participants?
c) how many participants have age less than 25 years?
d) what percentage of participants have age more than or equal to 30 but less than 40 years?
Answer:
A. 21
B. The age group that are 40
c. 2 participants
D. 33.3% ?
Step-by-step explanation:
Brainlyest for who works this out for me
43 is what percent of 50?
Pls step by step
Answer:
86%
Step-by-step explanation:
43:50 × 100
(43 × 50):50
4300:50 = 86
pls helppppppppppp plsss
The nth term of a sequence is -3-3n what is the 6th term
Answer:
-21
Step-by-step explanation:
if for s(n) = -3-3n
then s(6) = -3-3*6 = -3-18 = -21
Since 2 is further left on a number line than 5,2 -5
Answer:
lower right
Step-by-step explanation:
select all expressions equivlent to 6x- 24
Suppose a pumpkin is fired straight upward from the barrel of a cannon at a point 20 feet above the ground, at a speed of 90 feet per second. If there were no gravitational force pulling the pumpkin back toward the ground then, 1. How high would the pumpkin be after 1 second?, 2. How high would the pumpkin be after 2 seconds? 3. How high would the pumpkin be after 10 seconds? and last question 4. What does the ''t" represent and what does "h(t)" represent?
Answer: after 1 second the pumpkin will be 110 ft in the air. after 2 seconds it will be 200 ft in the seconds. after 10 seconds the pumpkin will be 920 ft in the air. t represents time and h(t) represents height per second.
Step-by-step explanation:
I need help i dont understand it. its due in literally 2 hrs.
Answer:
$1.25&75
Step-by-step explanation:
8 hotdogs for 10 dollars =
1 hotdog for 1.25 dollars.
1.25×60 = 75
What is 0.024 + 0.003 in words
Answer:
Step-by-step explanation:
two hundredths four thousandths +three thousandths = two hundredths seven thousandths
XLiV represents 64 true ya false
Answer:
False
Step-by-step explanation:
Given
[tex]XLIV = 64[/tex]
Required
True or False
The above numeral can be split as follows:
[tex]XLIV = XL + IV[/tex]
X means 10 and L means 50.
But because X (10) which is smaller comes before L (50), XL is executed as:
[tex]XL = -10 + 50[/tex]
[tex]XL = 40[/tex]
In Roman numerals;
[tex]IV = 4[/tex]
Substitute 40 for XL and 4 for IV.
[tex]XLIV = 40 + 4[/tex]
[tex]XLIV = 44[/tex]
Hence;
[tex]XLIV = 64[/tex] is false
I GIVEEEEE BRAINLILSTE
Answer:
20.4cm²
Step-by-step explanation:
base= 10.2
height= 2
10.2×2=20.4cm²
E
Three children are sharing 4 pizzas. Each child
should have the same amount of pizza. How
much pizza can each child have?
Answer:
4 slices of pizza I think
Jayden is driving to a concert and needs to pay for parking. There is an automatic fee
of $9 just to enter the parking lot, and when he leaves the lot, he will have to pay an
additional $3 for every hour he had his car in the lot. How much total money would
Jayden have to pay for parking if he left his car in the lot for 4 hours? How much
would Jayden have to pay if he left his car in the lot for t hours?
Answer:
1). $21
2). $9 + $3t
Step-by-step explanation:
1). 9+3(4)=a
9+12=a
a=21
2). 9+3(t)
9+3t
Total money would Jayden have to pay for parking after addition of automatic fee and additional fee is,
1. $21
2. $12
What is multiplication?The fundamental concept of repeatedly adding the same number is represented by the process of multiplication. The results of multiplying two or more numbers are known as the product of those numbers, and the components that are multiplied are referred to as the factors.
Given that,
Jayden is driving to a concert and needs to pay for parking
There is an automatic fee of $9 just to enter the parking lot
when he leaves the lot, he will have to pay an additional $3 for every hour
Total money = ?
1. When he left the parking after 4 hours
Total money = automatic fee + additional fee
= 9 + (3×4)
= $21
2. When he left the parking after 1 hours
Total money = automatic fee + additional fee
= 9 + (3×1)
= $12
Hence, the fee is respectively for both the cases are $21, $12
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Multiply.
323⋅34 PLZZZ whenever you get the time to help pls answer
Answer:
10,982
Step-by-step explanation:
use a calculator lol
PLEASE PLEASE HELP!!!!
Answer:
3
Step-by-step explanation:
What value of k makes the equation true?
(5a^2b^3)(6a^kb)=30a^6b^4
o 2
O 3
O4
O 8
helpppp !
Answer:
4
Step-by-step explanation:
(5a^2b^3)(6a^kb) = 30a^6b^4
a^2 * a*k = a^6
a^(2 + k) = a^6
2 + k = 6
k = 4
Answer: 4
The value of k from the equation is k = 4
What are the laws of exponents?When you raise a quotient to a power you raise both the numerator and the denominator to the power. When you raise a number to a zero power you'll always get 1. Negative exponents are the reciprocals of the positive exponents.
The different Laws of exponents are:
mᵃ×mᵇ = mᵃ⁺ᵇ
mᵃ / mᵇ = mᵃ⁻ᵇ
( mᵃ )ᵇ = mᵃᵇ
mᵃ / nᵃ = ( m / n )ᵃ
m⁰ = 1
m⁻ᵃ = ( 1 / mᵃ )
Given data ,
Let the exponential equation be represented as A
Now , the value of A is
( 5a²b³ ) ( 6a^k )b = 30a⁶b⁴
On simplifying , we get
From the laws of exponents , we get mᵃ×mᵇ = mᵃ⁺ᵇ
So , ( 30a^( 2 + k ) ) b⁴ = 30a⁶b⁴
Divide by 30b⁴ on both sides , we get
a^( 2 + k ) = a⁶
Now , the bases of the exponents are same ,
So , 2 + k = 6
Subtracting 4 on both sides , we get
k = 4
Therefore , the value of k = 4
Hence , the exponential equation is solved
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