Answer:
a. 0.48
b. The 96% confidence interval for p is (0.457, 0.503).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].
In a poll of 2000 likely voters, 960 say that the US spends too little on fighting hunger at home.
This means that [tex]n = 2000, \pi = \frac{960}{2000} = 0.48[/tex].
This is the answer for question a.
96% confidence level
So [tex]\alpha = 0.04[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.04}{2} = 0.98[/tex], so [tex]Z = 2.056[/tex].
The lower limit of this interval is:
[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.48 - 2.056\sqrt{\frac{0.48*0.52}{2000}} = 0.457[/tex]
The upper limit of this interval is:
[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.48 + 2.056\sqrt{\frac{0.48*0.52}{2000}} = 0.503[/tex]
The 96% confidence interval for p is (0.457, 0.503).
What is the answer to -5+(-5r)+10
Answer:
=−5r+5
Step-by-step explanation:
Let's simplify step-by-step.
−5−5r+10
=−5+−5r+10
Combine Like Terms:
=−5+−5r+10
=(−5r)+(−5+10)
=−5r+5
Answer: -5r+5
Step-by-step explanation: 1rst: Eliminate redundant parentheses
-5+(-5r)+10
-5-5r+10
2nd: Add the numbers
-5-5r+10
5-5r
3rd: Rearrange terms
5-5r
-5r+5
Which phrase best describes the relationship indicates by the scatter plotting?
Answer:B
Step-by-step explanation:
Please help I'm confused with what to put in those boxes
Help please
look picture and match
Answer:
Rectangle= Choice four
Square= Choice three
Trapezoid= Choice one
Parallelogram= Choice two
Rhombus= Choice five
-----------------------------------------------------
I think these are the correct answers. Hope this helps!
↓⊂∩⊥ββ⊄⊃БНasdsxЫ
c=9 d=8
6d-2c
Answer:
im sorry what?
Step-by-step explanation:
5th grade math. correct answer will be marked brainliest. what are the last 2 boxes?
Answer:
you forgot (2,28) :)
Step-by-step explanation:
Y=3(x+2)^2-3 in standard form
Y= x2 - 12x + 15 Y=3(x+2)^2-3 in standard form
Laura had a toy robot collection. 4/7 of her 28 robots make noise. How many of Laura’s robots make noise? If you guys answer can you please do show you work.
Answer:
4/7 of 28 robots is 16.
Step-by-step explanation:
This is because 4/7 is equal to 16/28 when you simplify it. multiply 7 by four and you get 28 as your denominator and 16 as your numerator.
When Joe solved a system using substitution, he got 7 = 9. What can Joe
conclude? *
The solution to the system is (7.9).
The system of equations does not have a solution,
The work must be incorrect because it is not possible to get this equation
The system of equations has infinitely many solutions,
Answer:
The system of equations does not have a solution
Step-by-step explanation:
Whenever you get a number = a different number, that means there's no solution.
Answer and explain ILL MARK BRAINLIEST I DONT UNDERSTAND
First let's reduce the feet to miles
there are 5280 feet in a mile therefore
26400 feet=5 miles
31680 feet=6 miles
Jet A(the first jet) descends 5 miles in 96 miles
Jet B(the second jet) descends 6 miles in 120 miles
We can compare these as fractions to see which is steeper. This can be viewed as slope and the origin (0,0) is the airport.
slope: 6/120=?=5/96
1/20=?=5/96
Now we know that 5/100 =1/20 so 5/96 must be bigger than 5/100 because you are dividing by a smaller number.
so 1/20<5/96
So Jet B is descending steeper than Jet A.
As for linear model, I don't exactly know what your teacher means but I think I actually used the linear model when I'm thinking of steepness as slope in the coordinate plane, I will include a picture.
In this extremely zoomed out graph, you can see the blue line is just slighly higher than the red line(slope as in explanation is way easier to tell) this could be seen as the linear model) :) Hope it helped!
Factorise
7lm - 21lmn
Answer:
7lm - 21lmn
taking common 7lm
7lm(1-3n)
i will give you brainliest whoever answers correct first!!
Use the bar graph to find the probability of the event
Not spinning a 1
10+8 you add all the data to get your answer
Look at the image. Could someone please help me out? Only question B Thank you! WILL GIVE BRAINLYEST
Answer:
y = 3
Step-by-step explanation:
2x+6y=5x+4y if x=2
2(2)+6y=5(2)+4y
4+6y=10+4y
-4 =-4
6y=6+4y
-4y= -4y
2y=6
/2=/2
y=3
When 6 is added to four times a number, the result is 50
Answer:
50-6= 54
54÷4= 13.5
editing for clarity.
first you subtract the 6 from the 50 to find out what the "4 times a number" came to.
in this case, 50-6, which equals 54.
then, you divide the 54 by 4 to get 13.5.
so, the whole math problem would be
4 times 13.5 plus 6 equals 50.
Need help fast with this
Answer:
c
Step-by-step explanation:
A single six-sided die is rolled. Find the probability of rolling a seven.
Answer: there is no probability to roling a 7
Step-by-step explanation: there are only 6 sides to the die that is rolled
Please!!!!! help!!!!!
Answer:
x = 6, x = 8, and x = 10
Step-by-step explanation:
Since 44 > 35, that means that
[tex]2x + 3 > x + 8\\x + 3 > 8\\x > 5[/tex]
so that means the ones that work are x = 6, x = 8, and x = 10
u={1,2,3,4,5,6,7,8,9}
a={2,4,6,8}
b={3,6,9}
What is the set AUB?
Answer:
AUB = {2,3,4,6,8,9}
Step-by-step explanation:
The set u should not be included in set AUB
Barbara charges $3.50, plus $2.25 for each hour she babysits. If Barbara charges $21.50, how many hours does she babysit?
Answer:
8 hours
Step-by-step explanation:
The equation is 2.25X + 3.50 = 21.50
X represents the unknown amount of hours she worked. 2.25 is the cost per hour. 3.50 is the fee she charges for every gig. That fee only happens once a gig so naturally it wasn't the number x was placed with.
2.25X + 3.50 = 21.50
2.25X + 3.50 - 3.50 = 21.50 - 3.50
2.25X = 18
2.25X = 18
2.25 2.25
X = 8
I cut a pizza in half. Then I cut each half into 3 equal pieces and each piece into 2 equal slices. I sold 6 slices. What fraction of the pizza did I sell?
Answer:
6/12
Step-by-step explanation:
im pretty sure, i did it on a paper correct me if im wrong sorry if i am
HELP MEEEE plzzz Kkkakskwkwiks
Answer:
a
Step-by-step explanation:
Is my Answers Correct? Very easy Question!
Answer:
Step-by-step explanation:
Correct
Step-by-step explanation:
the 5th one on the right is standard form,
the second one is perfect square form.
Write the equation of a line parallel to and passes through the given line’s x-intercept. Leave answer
in slope-intercept form
Answer:
y = 1/2x - 4
Step-by-step explanation:
The x-intercept is when y = 0, so it would be:
-x + 2 * 0 = 4
-x = 4
x = -4
That means the x-intercept is (0, -4)
The parallel line would have the same slope as this one, so:
[tex]-x+2y = 4\\2y = x + 4\\y = 1/2x + 2[/tex]
The parallel line has a slope of 1/2
So now you need to find the equation of a line that has a slope of 1/2 and passes through the point (0, -4)
Put it in point slope form:
y - (-4) = 1/2(x - 0)
y + 4 = 1/2x
y = 1/2x - 4
A bus can hold a total of 60 students. The bus is 73% full how many students are on the bus?
Answer:
44
Step-by-step explanation:
so youre looking for 73% of students rite? of means multiplication , you just times 73% by 60
73%*60=43.8
but there cant be point 8 of a person unless theyre missin a couple limbs, so you round up to 44!
hope it helps :)
There are 4 oranges, 7 bananas, and 5 apples in a fruit basket.
Ignacio selects a piece of fruit at random and then Terrance
selects a piece of fruit at random.
probability of two bananas
p( two bananas )
.hnsxasy543esx nuyAtre
in a classroom 1/6 of the students are wearing blue shirts and 2/3 of wearing white shirts there are 36 students in the class how many students are wearing blue shirts
Answer:
6 students are wearing blue shirts
Step-by-step explanation:
you divide 36 by 6 and that equals 1/6 of the students.
wHy dO i FeEl HaPpy?
Answer:
Step-by-step explanation:
because its called an emotion have a great day
:)
Answer:
maybe you ate dark chocolate? lol
Step-by-step explanation:
:)
Michelle's quiz grades are 73, 75, 89, and 91. What score on her fifth quiz will make her average quiz grade at least 85?
Answer:
in order to have an average of 85 on 5 tests, she needs to score a total of 85x5.
that's 425 points.
on the first 4 quizzes, she has earned 328 points.
she needs to score 97 points on the 5th quiz to average 85.
she needs to study very hard!
graph y = 1/2x+3
identify the x intercept
step by step explanation
Step-by-step explanation:
x-intercept: where y = 0
Set y to zero to find x.
0 = ½x + 3
-3 = ½x
x = -6
(-6, 0)