The 10 percent rule is used to approximate the independence of trials where sampling is taken without replacement.
Why do we check the 10% condition in stats?
It's important to check the 10% condition before calculating probabilities involving x because we want to ensure that the observations in the sample are close to independent.
According to the premise of independence, your data are not related in any manner (at least not in a way that your model hasn't taken into consideration). Actually, there are two assumptions: Since the groups should have diverse compositions, independent observations should be performed between them.
The frequency with which students ask to leave the room during crucial informative periods is reduced thanks to this technique. The 10/10 rule, which prohibits pupils from leaving the classroom during the beginning or last ten minutes of class, is used to achieve this.
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- Pule, mpho
and
lese go are
are sharing R6oo
in
a ratio 2:3:1, How
much will each get?
Step-by-step explanation:
plz don't forget to add sentences
....
A researcher wished to compare the average amount of time spent in extracurricular activities by high school students in a suburban school district with that of high schoolers in a school district of a large city. The researcher obtained an SRS of 60 high school students in a large suburban school district and found the mean time spent in extracurricular activities per week to be x1 = 6 hours, with a standard deviation s1 = 3 hours. The researcher also obtained an independent SRS of 40 high school students in a large city school district and found the mean time spent in extracurricular activities per week to be x2 = 4 hours, with a standard deviation s2 = 2 hours. Let u1 and u2 represent the mean amount of time spent in extracurricular activities per week by the populations of all high school students in the suburban and city school districts, respectively. Assume the two-sample t-procedures are safe to use.
With a level of 5%, test the hypothesis that the amount of time spent on extracurricular activities is no different in the two groups.
For the problem above, a 95% confidence interval for u1-u2 is (use the conservative value for the degrees of freedom)
a. 2 +- 0.5 hours.
b. 2 +- 0.84 hours.
c. 2 +- 1.01 hours.
d. 2 +- 1.34 hours
Simplify the polynomial by combining like terms. 3.63x2 - 4.54x + 7.96x2 +9.85 -3.12x
Answer:
11.59x² -7.66x + 9.85
Step-by-step explanation:
3.63x² - 4.54x + 7.96x² +9.85 -3.12x
11.59x² -7.66x + 9.85
i'm pretty sure its 11.59x2−7.66x+9.85
The population of rabbits on an island is growing exponentially. In the year 2001, the population of rabbits was 2400, and by 2004 the population had grown to 2900. Predict the population of rabbits in the year 2012, to the nearest whole number.
Answer:
4067
Step-by-step explanation:
I need help on this question it’s 5(n)=??
Answer:
i think its 120
sorry if it might be incorrect
????
s s s s s s s s s s s s s s s s s s s ss s s s s s s s s s ss s s s s s s s s s s s s ss s s please help‼️‼️
Answer: Point W is the answer.
Step-by-step explanation:
Answer:
the answer is w
Step-by-step explanation:
x is 2
y is -5.5
Plz Ans my question its urgent
Box 1
x - y = 4
x - 0 = 4
x = 4
Box 2
x = 4
y = 0
(x, y) => (4, 0)
Box 3
x - y = 4
-1 - y = 4
-y = 4 + 1
y = -5
Box 4
x = 0
y = -4
(x, y) => (0, -4)
answer correctly plss
(an explanation on how to determine if the function is linear, quadratic, or an exponential function will get brainly)
Answer:
equation is -3x+4
Step-by-step explanation:
function is linear because x is always constant
please help me please
Answer:
its -2
Step-by-step explanation:
like my answer and gimme brainliest please
Assignment Ordering with Square Roots Using the Number Line Side se green dot from O piot dhe number at the corres Qon Use the number line to plot the numbers. Then arrange them in order from smallest (1) to largest (4). 10.2 10.4. 3 . Thas a ponton ja numba
Answer:
See below
Step-by-step explanation:
square root of 0.2 is around 0.4472 . . .
square root of 0.4 is around 0.6324 . . .
so, if we are ordering them from least to greatest, the order will go as follows:
1. 0.2
2. 0.4
3. square root of 0.2 (0.4472...)
4. square root of 0.4 (0.6324...)
I’ll give the Brainliest to who answers these questions with reasonable explanations.
1. In a bag there are 3 red marbles, 2 yellow marbles and 1 blue marble. After a marble is selected, it is replaced. What is the theoretical probability of pulling a blue marble and then a yellow marble?
A. 0.0278
B. 0.1667
C. 0.3333
D. 0.0556
2. In a bag there are 3 red marbles, 2 yellow marbles and 1 blue marble. After a marble is selected, it is replaced. After 40 attempts at drawing two marbles from the bag, there were three instances where a blue marble then a yellow marble was pulled. What is the experimental probability of pulling a blue marble and then a yellow marble?
A. 0.0750
B. 0.0167
C. 0.0333
D. 0.0556
Answer:
I believe A is the right answer
Step-by-step explanation:
Answer:
question 2 is i know its not an option but its 0.075
question 1 is 0.0556
Step-by-step explanation:
i took the quiz and got it right.
34. Find the solutions to x2 = 12.
Answer:
x = 6
Step-by-step explanation:
6 x 2 = 12
Answer: look at the picture
Step-by-step explanation: Hope this help :D
What is the mean for this list of numbers? 4, 8, 12, 13
Answer and Explain how you got the answer
Answer:
9.25
Step-by-step explanation:
Add up all of the numbers and then divide that answer by how many numbers you added up
Answer:
Mean = 9.25
Step-by-step explanation:
Mean = (sum of numbers)/( how many numbers)
There are 4 numbers: 4, 8, 12, 13
Mean = (4 + 8 + 12 + 13)/4
Mean = 37/4
Mean = 9.25
538 divided by 6 pls help me
Answer:
89.67
Step-by-step explanation:
Maybe this answer i don’t know not 100% sure
Solve this system of linear equations. Separate
the x- and y-values with a comma.
10x + 17y = -89
5x + 7y = -34
Answer:
(3,-7)
Step-by-step explanation:
10x +17y = -89
-(10x + 14y = - 68)
3y = -21
y = -7
5x + 7(-7) = -34
5x -49 = -34
5x = 15
x = 3
PLEASE HELPP ME IM GONNA FAIL
Answer:
90 degrees.
Step-by-step explanation:
They right ray point is on the 90 degree number and left ray is on zero so we find the difference.
90-0=90
so it measures 90 degrees.
Answer:
<ba=180 <bc=90
Step-by-step explanation:
What exponential function represents the data in the table?
x f(x)
2 25
3 125
4 625
f(x) = x4 + 9
f(x) = 4x + 9
f(x) = x5
f(x) = 5x
Answer:
The Fourth one
[tex]f(x) = {5}^{x} [/tex]
Step-by-step explanation:
I hope that is useful for you :)
PLEASE don't make a link give me the answer nd how you got it i trust you. A=__in^2
WILL GIVE BRAINLIEST IMMEDIATELY!!!!!!!
4. Consider the circle to the right.
Determine m∠KNY.
Show all steps to be marked brainliest. I will give brainliest as soon as I can.
Answer:
The measure of m∠KNY is;
(D) 105°
Step-by-step explanation:
From the diagram, we have;
The given angle at the circumference = The The angle the arcs makes at the center of the circle
From circle, theorem, angle subtended at the center = Twice the angle subtended at the circumference
Therefore;
Angle ∠D and angle ∠Y = 90°/2 = 45°
Angle ∠O and angle ∠K = 60°/2 = 30°
From angle summation theorem, we have;
m∠KNY + ∠K + ∠Y = 180° (The sum of the interion angles in ΔYNK
∴ m∠KNY = 180° - (∠K + ∠Y)
Plugging in the known values of ∠K and ∠Y gives;
m∠KNY = 180° - (30° + 45°) = 105°
m∠KNY = 105°.
factorise completely:
1. 3xy - x
2. 4a² - 9
Answer:
x(3y - 1) and (2a - 3)(2a + 3)
Step-by-step explanation:
(1)
3xy - x ← factor out x from each term
= x(3y - 1)
(2)
4a² - 9 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b) , then
4a² - 9
= (2a)² - 3²
= (2a - 3)(2a + 3)
what does f(2x+16) mean, id f at 2x
+16
Find the area of the semicircle. Round your answer to the nearest whole number, if necessary.
area: about
cm2
Answer:
2513.27 my dear check if correct
Step-by-step explanation:
Answer:
it 628 i hope that helps you
Step-by-step explanation:
This is for today help me pls!!!
Answer:
Part 1 is the 16 square feet
Part 2 is the 128 cube feet
Please help me quickly -5 - 6a = -59
Answer:
a=9
Step-by-step explanation:
What is m∠1? HELP ME PLEASE
Answer:
97
Step-by-step explanation:
exterior angle property of triangle
64+33 equals 97
in other ways
By Angle sum property of triangle, the measure of 3rd angle is 83 and
angle 1 and 3rd angle are supplementary
so,
180 - 83 = 97
Please do the bottom question. 5th grade math
Answer:
7.76
Step-by-step explanation:
theres not really an explanation just add them and you'll get the answer
Answer:
7.79
Step-by-step explanation:
4.56
+3.23
_____
7.79
Hope this helps :)
find the value of x in this screenshot
Answer:
X=24
Step-by-step explanation:
3x+5+2x-4+2x+11=180
7x+12=180
7x=180-12
7x=168
7x/7=168/7
x=24
What positive integer is closest to the value of the 200^2?
The table below gives a record of the funds raised by a TV station since its first year of operations. Draw a scatter plot for the data.
Year
1
3
5
8
11
14
Contributions
($ thousands)
70,000
150,000
190,000
230,000
270,000
290,000
a.
A graph has year on the x-axis, and contribution on the y-axis, from 50,000 to 500,000. Points are at (1, 75,000), (3, 25,000), (5, 190,000), (8, 240,000), (11, 270,000), (14, 290,000).
c.
A graph has year on the x-axis, and contribution on the y-axis, from 50,000 to 500,000. Points are at (1, 70,000), (3, 150,000), (5, 190,000), (8, 230,000), (11, 270,000), (14, 290,000).
b.
A graph has year on the x-axis, and contribution on the y-axis, from 50,000 to 500,000. Points are at (1, 75,000), (3, 150,000), (5, 190,000), (8, 240,000), (11, 290,000), (14, 290,000).
d.
A graph has year on the x-axis, and contribution on the y-axis, from 50,000 to 500,000. Points are at (1, 70,000), (1, 280,000), (3, 150,000), (5, 190,000), (8, 230,000), (14, 290,000).
Please select the best answer from the choices provided
A
B
C
D
The scatter plot is solved a graph has year on the x-axis, and contribution on the y-axis, from 50,000 to 500,000. Points are at (1, 70,000), (3, 150,000), (5, 190,000), (8, 230,000), (11, 270,000), (14, 290,000).
What is a Scatter Plot?Dots are used in a scatter plot to show the values of two different numerical variables. Each dot's location on the horizontal and vertical axes represents a data point's values. To view relationships between variables, utilize scatter plots.
The closer the data points come to forming a straight line when plotted, the higher the correlation between the two variables, or the stronger the relationship. If the data points make a straight line going from near the origin out to high y-values, the variables are said to have a positive correlation.
Using end behavior, turning points, intercepts, and the Intermediate Value Theorem, plot the graph of a polynomial function.
Given data ,
Let the scatter plot represents the funds raised by a TV station since its first year of operations
Let the number of years be represented as x
Let the contribution be represented as y
where the values of x and y are
x = { 1 , 3 , 5 , 8 , 11 , 14 }
y = { 70000 , 150000 , 190000 , 230000 , 270000 , 290000 }
The scatter plot is graphed and the linear regression equation is
y = 15901.6x + 88688.5
Hence , the scatter plot for the contribution for x years is plotted
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Help PLZ will get points + brainliest
Answer:
b=-12
Step-by-step explanation: