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-Just sayi’n
Related Questions
HELP ME AS SOON AS POSSIBLE PLEASE HELP ME
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A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow.
Hours Of Sleep 39 or Younger 40 or Older
Fewer than 6 38 36
6 to 6.9 60 57
7 to 7.9 77 75
8 or More 65 92
Required:
a. Conduct a test of independence to determine whether hours of sleep are independent of age. Using α= 0.05 level of significance
b. Compute the value of the 2 test statistic.
c. The p-value is:________
d. What is your conclusion?
Answers
Answer:
Kindly check explanation
Step-by-step explanation:
Given the data :
________Hours of sleep______
Age ___<6__6-6.9___ 7-7.9 __≥8 ___total
≤ 39___38___60_____77____65____240
≥ 40___36___57_____75____92____260
A.) test of independence for row and column variables :
Null: row and column variables are independent
Alternative : row and column variables are not independent
Expected frequencies :
[(row total) * (column total] / sample size
E1: ((38+60+77+65)*(38+36))/500 = 35.52
E2: ((38+60+77+65)*(60+57))/500 = 56.16
E3: ((38+60+77+65)*(77+75))/500 = 72.96
E4: ((38+60+77+65)*(65+92))/500 = 75.36
E5: ((36+57+75+92)*(38+36))/500 = 38.48
E6: ((36+57+75+92)*(60+57))/500 = 60.84
E7: ((36+57+75+92)*(77+75))/500 = 79.04
E8: ((36+57+75+92)*(65+92))/500 = 81.64
Then performing the Chisquare independence test X²
X² = Σ[(f1-e1)²/e1 + (f2-e2)²/e2... (fn - en)²/en]
F1 to f8 = 38,60,77,65,36,57,75,92
X² = ((38-49.92)^2)/35.52 + ((60-56.16)^2)/56.16 + ((77-72.96)^2)/72.96 + ((65-75.36)^2)/75.36 + ((36-38.48)^2)/38.48 + ((57-60.84)^2)/60.84 + ((75-79.04)^2)/79.04 + ((92-81.64)^2)/81.64
= 4.0070162
X² = 4.00
α = 0.05
Reject Null if p < α
df = (row - 1)*( column - 1)
df = (2 - 1)*(4-1) = 1*3 = 3
To obtain the p value, we can use an online calculator to compute the P-value from the X² square score at α = 0.05 and 3 degree of freedom
p = 0.261
Since ; p > α ; 0.261 > 0.05 ; The result is not significant at α 0.05 ; Hence we fail to reject the Null.
Who can possibly beat me?
A. Kakarot
B. Gohan
C. Broly
D. Frieza
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Answer:
C
Step-by-step explanation:
Explanation
Please help me. ____\\\\\\\\\[]_____
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Marty ran 2.62 miles four days in a row. How far did he run all four days this week?
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Answer:
10.48
Step-by-step explanation:
Answer:
10.48 mi
Step-by-step explanation:
2.62 times 4= 10.48
Which input value produces the same output value for
the two functions on the graph?
NO
O x=-3
O x= -2
O x= -1
O x=3
1-3 -2 -1
1 2 3 4 5 x
4
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Answer:
x= 3 ; the answer choice D.
Step-by-step explanation:
EDGE 2020, just took the test.
how do you solve y=x²+1
plsss help! show solution!
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Answer:
[tex]\sqrt{x-1} , -\sqrt{x-1}[/tex]
Step-by-step explanation:
(y=x^2+1)^-1=
x=y^2+1
x-1=y^2
+ or -sqrt(x-1)=y
therefore, y=
[tex]\sqrt{x-1} , -\sqrt{x-1}[/tex]
Which ordered pairs are solutions to the equation 6x + 7y = 6?
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Answer:
(2,−6/7), (3,−12/7), and (6,−30/7)
Step-by-step explanation:
list the angles in order from smallest to largest.
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Answer:
What are the angles
Step-by-step explanation:
List all the angles
3/12 + -1 2/3 as a improper fraction
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Answer:-17/12
Step-by-step explanation:
convert fractions, subtract
Which ordered pair is a solution of 5x + 4y = 18?
O (-3,6)
O (2,4)
O (8,2)
O (-2,7)
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Answer:
(-2,7)
Step-by-step explanation:
Remember: (x, y), Substitute the numbers:
1. (-3, 6)
5 • -3 + 4 • 6 = 18
-15 + 24 = 18
9 = 18 X, incorrect
2. (2, 4)
5 • 2 + 4 • 4 = 18
10 + 16 = 18
26 = 18 X, incorrect
3. (8, 2)
5 • 8 + 4 • 2 = 18
40 + 8 = 18
48 = 18 X, incorrect
4. (-2, 7)
5 • -2 + 4 • 7 = 18
-10 + 28 = 18
18 = 18, ☆, correct!
an airplane was at 34500 feet in the air
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Answer:
And....? Is there anything else to it?
 pi times 1.5 to the second power times eight
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Answer:
56.54866776
Step-by-step explanation:
:) Hope this helps
56.5486677646
or just 56.54 works :)
Water is pumped from a tank at constant rate, and no more water enters the tank. If the tank contains 19140 L at 4:47 PM and 8097 L at 5:05 PM the same day, how many liters will the tank contain at 5:11 PM that day?
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Answer:
The liters that the tank will contain at 5:11 PM that day are:
4416 Liters.Step-by-step explanation:
Firstly, you must identify the outlet flow of the water pumped from the tank, for this, you must subtract the last volume given from the first volume:
19,140 L - 8,097 L = 11,043 LAnd the minutes that passed from the first volume until the last volume given (18 minutes from 4:47 PM to 5:05 PM), so, you must divide that two values to obtain the outlet flow:
Outlet flow = [tex]\frac{Volume}{Time}[/tex] Outlet flow = [tex]\frac{11,043 L}{18 min}[/tex] Outlet flow = 613.5 [tex]\frac{L}{min}[/tex]Now, you must see the next hour given (5:11 PM), if you see, from 5:05 PM to 5:11 PM has passed 6 minutes, taking into account this, you replace the equation of outlet flow to clear the volume:
Outlet flow = [tex]\frac{Volume}{Time}[/tex] Volume = Outlet flow * timeAnd replace the values to obtain the new volume pumped:
Volume = 613.5 [tex]\frac{L}{min}[/tex] * 6 minVolume = 3681 L.At last, you must subtract these liters from the last volume identified in the tank:
New Volume in the tank = 8097 L - 3681 LNew Volume in the tank = 4416 LThe volume in the tank at 5:11 PM is 4416 Liters.
The tank will contain 4416 L of water at 5:11 PM .
Rate of discharge of water:Given that, the tank contains 19140 L at 4:47 PM and 8097 L at 5:05 PM
It means that, in 18 minutes the amount of water discharge is,
[tex]=19140-8097=11043L[/tex]
The rate of flow is,
[tex]=\frac{11043}{18}=613.5L/min[/tex]
From 5:05 PM to 5:11 PM , six minutes are passes.
Water discharge in that six minute is ,
[tex]=613.5*6=3681L[/tex]
The tank will contain at 5:11 PM is,
=[tex]8097-3681=4416L[/tex]
Learn more about rate of flow here:
https://brainly.com/question/21630019
pls help!!! I will make you brainiest!!!!! What is the rate of change?
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Answer:
the rate iof change is 286
Step-by-step explanation:
Answer:
Rate of Change is 65
Step-by-step explanation:
260/4 = 65
585/9 = 65
845/13 = 65
1105/17 = 65
1625/25 = 65
Plzzzz help like just plzzzzz In Alana's math class, there are 12 boys and 13 girls. What is the ratio of boys to girls?
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Simplify
6x2 + 8x + 11 + 4x + 9x2
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Answer:
24x+29
Step-by-step explanation:
Answer:
15x^2+12x+11
Step-by-step explanation:
Hope this helps!
The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every
customer who spends more than a certain amount per visit at this supermarket. The expectation of the
management is that after this promotional policy is advertised, the expenditures for all customers at this
supermarket will be normally distributed with a mean of $95 and a standard deviation of $16. If the
management wants to give free gifts to at most 13.57% of the customers, what should the amount be
above which a customer would receive a free gift?
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Answer:
X ≥ 112,6 $
Step-by-step explanation:
Normal Distribution N ( 95 , 16 )
μ₀ = 95
σ = 16
We need to get z (score) for area 0,1357; then from z - Table we get
z (score) = 1,1
Now z (score ) = ( X - μ₀ )/σ
1,1 = ( X - 95 ) / 16
17,60 + 95 = X
X = 112,6 $
That means that in order to get a gift customes has to spend at least 112,6 $
Solve for X then find the measure of DEF. Write your answers in decimal form.
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Answer:
Since EF bisects ∠DEF, we know that EF splits ∠DEF in 2 halves from the word 'bisects', which can be written as 'bi- sects' , where bi means 2 and sects means sections
Hence, ∠DEG = ∠GEF --------------(1)
We are given the measure of these angles:
∠DEG = 3x - 4
∠GEF = x + 13
Now, replacing the values in (1):
3x - 4 = x + 13
2x = 17
x = 17/2
Now, finding the measure of ∠DEF:
∠DEF = ∠DEG + ∠GEF
∠DEF = 3x - 4 + x + 13
∠DEF = (51 / 2) - 4 + (17/2) + 13 (x = 17/2)
∠DEF = 34 - 4 + 13
∠DEF = 43°
Can anybody help me as soon as possible. Model with mathematics. The weight of a pen manufactured at the PEN factory is 8g. The actual weight can vary as much as 2g. Write and solve an inequality to represent all acceptable weights for a pen at this factory.
*25 POINTS*
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Answer:
[6, 10]Step-by-step explanation:
Let the weight of a pen be x
Then its weight can be between
8 - 2 = 6 g and 8 + 2 = 10 gThis can be shown as
8 - 2 ≤ x ≤ 8 + 26 ≤ x ≤ 10x = [6, 10]Suppose number of hours employees work in a week at a company are normally distributed with an unknown population mean and a population standard deviation of 2 hours. A random sample of 65 employees weekly hours is taken. These gave a sample mean time of 39 hours. Find the error bound (EBM) of the confidence interval with a 95% confidence level. A 2 by 5 z-table.
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Answer:
0.49
Step-by-step explanation:
We can use the formula to find the error bound:
EBM=(zα/2)(σ/√n)
We know that σ=2 and n=65. We are also given that the confidence level (CL) is 95%, or 0.95. So, we can calculate alpha (α).
α=1−CL
=1−0.95
=0.05
Since α=0.05, we know that α2=0.05/2=0.025. The value of z0.025 is 1.960.
Now we can substitute the values into the formula to find the error bound.
EBM=(zα/2)(σ/√n)
=(1.960)(2/√65)
≈(1.960)(0.248)
≈0.49
So, the error bound (EBM) is 0.49.
Please help me with this question
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Step-by-step explanation:
1. 120+21 =141
2. 21-3=18
3. 7x-21
4. 4x+20
5. 45+100=145
6. 40+5c
7. 20+22r+26s
Im not too sure about the other question
Will give brainliest if your answer is correct, please help me with this question it is past due (I have more questions like this that are also pat due, check my profile and go to questions to see them once I post the questions)
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Answer:
∠1 = ∠3 = ∠5 = ∠7 = 72°
∠2 = ∠4 = ∠6 = ∠8 = 180° -72° = 108°
∠13 = ∠14 = ∠15 = ∠16 = ∠17 = ∠18 = ∠19 = ∠20 = 90°
∠10 = ∠12 = 90° -72° = 18°
∠9 = ∠11 = 180° -18° = 162°
Step-by-step explanation:
Help if anyone know this
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Answer:
The first one is 0,4 and the other is 5,2
An oil storage tank is a cylinder with a height of 50 feet and a diameter of 20 feet. What is the volume of the tank? Use 3.14 for Pi.
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Answer:
15707.96ft³
Step-by-step explanation:
Help. (Math)
1. Using the geometry tools below, construct a bisection of the line segment EF.
2. Using the geometry tools below, construct a copy of the angle ABC below.
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Answer:
...................................
What value of x makes the equation true? 5x+3x–32+12=180
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Answer:
Step-by-step explanation:
Step 1: Simplify both sides of the equation
(5x+3x)+(-32+12)=180
8x-20=180
Step 2: Add 20 to both sides.
8x-20+20= 180+20
8x= 200
Step 3: Divide both sides by 8
8x/8= 200/8
x= 25
Please help fast pls
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Answer:10 7/30
Step-by-step explanation: If correct please give me brainliest Thank you ! :D
2 2/3 + 2 1/2 + 2 2/5 + 2 2/3 = 10 7/30
Answer:
10 7/30 or 10.23 hours
Step-by-step explanation:
2+2+2+2=8
(2/3)+(1/2)+(2/5)+(2/3)=67/30
67/30=2 7/30
2 7/30+8= 10 7/30
Describe the possible values of x.
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Answer:
2 ≤ x ≤ 7
Step-by-step explanation:
Due to the triangle inequality, the sum of two sides of a triangle must be greater than or equal to the remaining side.
Therefore,
5+7 ≥ 2x-2
=> 12 ≥ 2x-2
=> 14 ≥ 2x
=> 7 ≥ x
However, notice that BC + AB must be ≥ 7, So,
5 + 2x - 2 ≥ 7
=> 2x - 2 ≥ 2
=> 2x ≥ 4
=> x ≥ 2
Therefore, both bound of x have been found.
The possible values of x are 2< x < 7.
What is side length property of a triangle?In a triangle, the sum of two sides is always greater than the third side. And the difference of two sides is always less than the third side.
Given,
First side = 5
Second side = 7
Therefore, sum of first and second side = 5 + 7
= 12
Also, absolute difference of first and second side = 7 - 5
= 2
Therefore, we can write:
2 < 2x - 2 < 12
Or 4 < 2x < 14
2 < x < 7
Hence, the possible values of x are 2< x < 7.
To learn more about side property of triangle visit:
https://brainly.com/question/28709672
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1. How did Muhammad’s death in 632 affect the Muslim state he had established?
Why were the Muslims able to conquer the powerful Byzantine and Persian Empires in just 20 years??
Why did many Jews, Christians, and other non-Muslims convert to Islam in the growing Muslim empire?
Why was Abu Bakr important to the survival of the Muslim state??
How did the conquering caliphs treat their non-Muslim subjects??
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Answer:
tbh not sure sorry hope somebody anwsers
Step-by-step explanation: