You wonder if weather (rain, cloudy or sunny) makes a difference on mood (happy or not). To determine this, you sample the moods of 200 people on a sunny day, 200 people on a rainy day and 200 people on a cloudy day and record whether they were happy or not. You then want to do a chi square test on this data. What are the degrees of freedom?
Answer:
2
Step-by-step explanation:
Drawing a table to show the different weather and mood options :
The degree of freedom :
________ WEATHER ________
__________Rain ____ sunny _____ cloudy
Happy
|
Not happy
Here, we have a contingency table formatted in rows and columns
The columns = 3
The rows = 2
Degree of freedom :
(rows - 1) * ( columns - 1)
(2 - 1) * (3 - 1)
1 * 2
= 2
The degree of freedom = 2
PLEASE HELP ASAP!!!!!!!
Answer:
the wrong one is the last one
Step-by-step explanation:
because 9 times 40 doesnt = 350 it equals 360
HELP ME PLS I NEED HELP ALSO I NEED A SHOW YOUR WORK BUT PLS HELP
Step-by-step explanation:
6 y = mx + b
7. m
8. b
9a m = 4 (slope), b = 12(yintercept)
9b -1. 4
9c 8. 21
9d 12. 9
The population of Linton is 12 times as great
as the population of Ellmore.
The combined
population of both towns
is 9,646 people. What
the population of Linton
Answer:
8904 People
Step-by-step explanation:
We start by the equation L = 12E, where L represents the population of Linton and E represents the population of Ellmore. We then set L + E = 9646, but since L = 12E, we then get 12E + E = 9636, or 13E = 9646. Therefore, E = 742. L = 12E, so L = 8904.
kim's scores in the diving competition were 7,2, 6.975, 8.0 and 6.96 what is her total score
decimal
Answer:
8.0
Step-by-step explanation:
6.If Addison types at a constant rate of 2 pages per hour, how many hours will it take to
type a paper that is 5 pages long?Immersive Reader
(20 Points)
0.4 hour
2.5 hours
5 hours
10 hours
Answer:
2.5 hours
Step-by-step explanation
it takes 1/2 a hour to write one page so do
5 x 1/2 which is 2.5 since there are 5 pages
Milo visited an amusement park for 3 hours. He rodes rides for 50 minutes, played carnival games for 40 minutes, and ate food for 30 minutes. He spent the rest of the time waiting in lines. How much times did Milo spend waiting in lines?
Answer:
60 minutes
Step-by-step explanation:
3 hours = 180 minutes
180 - (50 + 40 + 30) = 180 - 120 = 60
A bike tire advertises that it is designed to be used for at least 4,000 km of riding. If the diameter of the tire is 0.7 m, how many rotations of the tire against the ground is that guaranteed, to the nearest thousand? There are 1,000 meters in a kilometer.
Answer:
1820000 rotationsStep-by-step explanation:
Circumference of the tire:
C = πd = 3.14*0.7 = 2.198 mNumber of rotations:
4000*1000/2.198 = 1820000 (rounded)help please, asap. i need this done
Answer:
30
Step-by-step explanation:
24/4=6
42/7=6
6 x 5=30
25 Point Reward please help
Answer:
I think its 75
Step-by-step explanation:
I am honestly not very sure myself but I did really do this
Find the equation on the line
Use exact number
Y=_x+_
NEED ASAP PLEASE
Answer:
1.5x+3
Step-by-step explanation:
......
.
..........
Someone please help me and explain it in simple words please and thank you.
Answer:
if you have a calculator above ti 84 you can enter integrals by pressing alpha window and selecting the integral option other than that it is not simple on paper you should look up a vid but it will take at least 15 mins to learn
alt optio. is to use wolfram alpha it works great you just input your problem
A bag of skittles includes 3 reds, 2 purple, 4 green, 2 organge, and 6 yellow. True or False - Is the theoretical probability of pulling a yellow out of the bag 3/11?
Answer:
true
Step-by-step explanation:
Answer:
False
Step-by-step explanation:
3 + 2 + 4 + 2 + 6 = 17
6/17, it cant be simplifed
Will paid $2.73 for 3.5 pounds of bananas. What was the cost per pound of the bananas?
stuck on this one.
Answer:
0.78¢
Step-by-step explanation:
if 3.5 lbs of bananas is $2.73, then we need to divide each side by 3.5 to get 1 lb of bananas
1 lb = 0.78¢
To check our work, we can do 0.78x3.5 = 2.73
Hope this helps! Please mark Brainliest if this helped :)
Mathilda adds up all the natural numbers from 1 to 10 and obtains a sum of S. Then she adds up 3 odd numbers between 1 and 10 and gets a sum of s. Which of the following could not be the value of S - s? HELP ASAP ILL MARK BRAINLIEST FOR CORRECT ANSWER. NO USING LINKS OR PDF OR USING FOR POINTS OR ELSE ILL REPORT U
A. 32
B. 36
C. 34
D. 40
E. 38
Answer:
A. 32
Step-by-step explanation:
1+2+3+4+5+6+7+8+9+10=55
55-32=23
55-36=19--can
55-34=21--can
55-40=15--can
55-38=17--can
combo of 3
1,3,5=9
137=11
139=13
157=13
159=15
179=17
357=15
359=17
379=19
579=21
According to the graph on your graphing tool, what is true about f(x)= x^4-4x^2+x/-2x^4+18x^2
Answer:
I can't see the options, so i will find all the asymptotes.
We have the function:
[tex]f(x) = \frac{x^4 - 4*x^2 + x}{-2*x^4 + 18*x^2}[/tex]
First, we can graph this using a graphing tool, the graph can be seen below.
In the graph, we can see that when we approach x = 0 from the left, f(x) goes to negative infinity, while if we approach x = 0 from the right, f(x) goes to infinity.
This can be written as:
[tex]\lim_{x \to 0_-} f(x) = - \infty \\[/tex]
and:
[tex]\lim_{x \to 0_+} f(x) = + \infty \\[/tex]
A similar thing can be seen at x = 3, when we approach from the left f(x) goes to infinity, while if we approach from the left, f(x) goes to negative infinity.
Then:
[tex]\lim_{x \to 3_-} f(x) = \infty \\\\\lim_{x \to 3_+} f(x) = - \infty \\[/tex]
For x = -3 we can see that when we approach from the left, f(x) goes to negative infinity, while if we approach from the right, f(x) goes to infinity.
Then:
[tex]\lim_{x \to -3_-} f(x) = - \infty \\\\\lim_{x \to -3_+} f(x) = + \infty \\[/tex]
We also can see that as x goes to negative infinity or positive infinity, f(x) tends to -0.5
Then:
[tex]\lim_{x \to \infty} f(x) = -0.5 \\ \lim_{x \to -\infty} f(x) = -0.5[/tex]
So you need to check the options that match with some of the given tendencies.
Answer:
b,c,d
Step-by-step explanation:
edg 21 ^u^
red die and a blue die are rolled. You win or lose money depending on the sum of the values of the two dice. If the sum is 5 or 9, you win $6. If the sum is 6, 7, or 12, you win $2. If the sum is any other value (2, 3, 4, 8, 10, or 11), you lose $4. Let X be a random variable that corresponds to your net winnings in dollars. What is the expected value of X
Answer:
The expected value of X is $0.2222.
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
For each dice, there are 6 possible outcomes(values from 1 to 6). So for 2 dices, there are [tex]6^2 = 36[/tex] possible outcomes.
Desired outcomes:
Sum 5: (1,4), (2,3), (3,2), (4,1).
Sum 6: (1,5),(2,4),(3,3),(4,2),(5,1)
Sum 7: (1,6), (2,5), (3,4), (4,3), (5,2), (6,1)
Sum of 9: (3,6), (4,5), (5,4), (6,3);
Sum of 12: (6,6)
Probabilities:
4 + 4 = 8 outcomes with a sum of 5 or 9.
8/36 = 2/9 probability of a sum of 5 or 9.
12 outcomes with a sum of 6, 7 or 12.
12/36 = 1/3 probability of the sum being 6, 7 or 12.
36 - 20 = 16 outcomes in which the sum is any other value. So
16/36 = 4/9 probability of a sum of any other value.
What is the expected value of X?
2/9 probability of earning $6.
1/3 = 3/9 probability of earning $2.
4/9 probability of losing $4.
Multiplying each outcome by its probability, we find the expected value. So
[tex]E = \frac{2}{9}*6 + \frac{3}{9}*2 - \frac{4}{9}*4 = \frac{12 + 6 - 16}{9} = \frac{2}{9} = 0.2222[/tex]
The expected value of X is $0.2222.
The green arcs show a pair of SAME SIDE INTERIOR ANGLES.
Drag the two black points to show another pair.
Same side interior angles are:
Always congruent
Sometimes congruent
Never congruent
Explain your thinking.
luciana is adding water to a pool
Answer:
B
Step-by-step explanation:
It would be B because she is adding 9 gallons per minute so you will have to add that to the 12,000 gallons to get w.
plzzz help will
mark the brainliest!!
9514 1404 393
Answer:
x = 10
Step-by-step explanation:
In a parallelogram, adjacent angles are supplementary.
(9x +15) +(6x +15) = 180
15x +30 = 180 . . . . . . . . . . simplify
15x = 150 . . . . . . . . . subtract 30
x = 10 . . . . . . . . divide by 15
PLEASE HELP ME ANSWER!!!
Answer:
61.3°
Step-by-step explanation:
For angle x, 12 is the adjacent leg. 25 is the hypotenuse.
The trig ratio that relates the adjacent leg and the hypotenuse is the cosine.
cos A = adj/hyp
cos x = 12/25
x = cos^-1 12/25
x = 61.3°
Express the tangent of angle U as a ratio of the given side lengths.
Answer:
Option c ==> 5/12 is the answer
The wholesale price of an X-BOX-X is $400.00 .It was then marked up 30% and sold online. What is the online price?
Answer:
$520
Step-by-step explanation:
1% of x is x times 0.01.
that means 10%of x is x times 0.1.
400 times 0.1 is 40.
40 is 10% of 400.
it was marked up by 30% so we need to times by 3.
40 times 3 is 120.
it was marked up so its addition.
400+120=520
The cost of a barrel of beans, b, fluctuates by 17% in both directions during a three-month period. Match each verbal description of the high and low cost of a barrel of beans with all
Answer:
b is increased by 17% : A and E
b is decreased by 17%: H and J
Step-by-step explanation: took the test
2x^2=4+6x
Show your work please
Answer: x = 3 - sqrt 17 / 2 , x = 3 + sqrt 17 / 2
Step-by-step explanation:
2x^2 = 4 + 6x
divide both sides by 2
x^2 = 2 + 3x
move expression to the left
x^2 - 2 - 3x = 0
reorder the terms
x^2 - 3x - 2 = 0
use the quadratic formula
x = - (-3) +- sqrt (-3)^2 - 4 x (-2) / 2 x 1
calculate
x = 3 +- sqrt 17 / 2
answer
x = 3 - sqrt 17 / 2 , x = 3 + sqrt 17 / 2
To find the diameter of a circle, multiply its radius by two. True or faulse
Answer: True
Step-by-step explanation:
Ms. Marcus saws an 8-foot board into 2 pieces. One piece is 3.625 feet long. What is the length of the other piece?
Answer:
4.375
Step-by-step explanation:
Taking off the length, we know you need to subtract. We can write out the answer as 8-3.625 which is 4.375.
By the way can you follow me on Brainly?
Thanks!
what is the distance between -8 and 535 on a number line
Answer:
527
Step-by-step explanation:
because i did it in the calculator
I’ll give brainliest
Answer:
oh delete my answer ;-;
Step-by-step explanation:
Suma, Recta, Multiplicación y División de enteros. (/ representa División)
1. -34+24=
2. 56-100=
3. -5×-9=
4. -27/9=
5.243/(-3)=
6. 45×-13=
7.-8-12=
8. -20+(-20)=
9. -3-(-7)=
10. 31×-5=
11. -1000/(-10)=
12. -2×0=
13. 25-24=
14. -24+40=
15. 6+(-9)=
16. -63/7=
17. -50×-20=
18. -7×-8=
19. 9-(-10)=
20. 0×-100=
Answer:
1.-34+24=10
2. 56-100=44
3.-5×-9=45
4.-27/9=3
5.243/(-3)=21
6.45×-13= 585
7.8-12=9
8.-20+(-20)=40
9.3-(-7)= 10
10.31×-5=155
11.1000/(-10)=100
12.-2×0=0
13.25-24=1
14.24+40= 64
15.6+(-9)=3
16.-63/7=9
17.-50×-20=1000
18.-7×-8=18
19.9-(-10)=19
20.0×-100=0
Answer:
1.-34+24=10
2. 56-100=44
3.-5×-9=45
4.-27/9=3
5.243/(-3)=21
6.45×-13= 585
7.8-12=9
8.-20+(-20)=40
9.3-(-7)= 10
10.31×-5=155
11.1000/(-10)=100
12.-2×0=0
13.25-24=1
14.24+40= 64
15.6+(-9)=3
16.-63/7=9
17.-50×-20=1000
18.-7×-8=18
19.9-(-10)=19
20.0×-100=0'\