Answer:
The 99% confidence interval is between 62.36%(lower bound) and 89.64%(upper bound).
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].
A sample of 65 students from the freshmen class is used and a mean score of 76% correct is obtained.
This means that [tex]n = 65, \pi = 0.76[/tex]
99% confidence level
So [tex]\alpha = 0.005[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.005}{2} = 0.995[/tex], so [tex]Z = 2.575[/tex].
The lower limit of this interval is:
[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.76 - 2.575\sqrt{\frac{0.76*0.24}{65}} = 0.6236[/tex]
The upper limit of this interval is:
[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.76 + 2.575\sqrt{\frac{0.76*0.24}{65}} = 0.8964[/tex]
0.6236*100 = 62.36%
0.8964*100 = 89.64%
The 99% confidence interval is between 62.36%(lower bound) and 89.64%(upper bound).
Mason spends $24 on hot dogs and buns for his graduation picnic. Hot dogs cost $3 per pack and buns cost $2 per packGraph the equation that models this situation, given that represents packs of hot dogs and y represents packs of buns
Answer: i don’t know
Step-by-step explanation: because I don’t know
-x/6 + 6 = 32
Please help me! Thank you
(The -x/6 is a fraction in case you thought it was division)
Answer:
x = -156
Step-by-step explanation:
Solve for x by simplifying both sides of the equation, then isolating the variable.
Answer: x=−156
Step-by-step explanation: −x/6 +6=32
−1 /6 x+6−6=32−6
−1 /6 x=26
( 6 /−1 )( −1 /6 x)=( 6 /−1 )(26)
x=−156
Functions W and Z are both linear functions of x. Which statement comparing the functions is true?
Answer is in the file below
tinyurl.com/wpazsebu
Identify the scalar
[10 12
0.75 15 11
8 10
Find the missing dimension. Use the scale factor 1: 8.
Model length: 6 cm.
Actual length: ?cm.
What is the actual length
Answer:
9cm
Step-by-step explanation:if im wrong sorry
A male African elephant weighs
7 Tons. A male African lion at the local zoo weighs
1
50
of
the weight of the male African elephant.
How many pounds does the lion weigh?
The lion weighs
pounds.
0.14 Short Tons = 280 pounds
(I dont know how a fat A* Lion weighs 280 pounds, but just go with it-)
Is 55.33 equal to 55.033
HELP PLEASE
A popular scale for model trains has a ratio of 3 inch to 20 feet. If a toy train is 4.5 inches long, how long is the real train?
A. 60 ft
B. 24.5 ft
C. 90 ft
D. 30 ft
) At a certain college, students are allowed to choose between online and in-person learning. 70% of the students choose online learning and 30% choose to come to campus for in-person instruction. Assume that the probability that a person studying online will contract the coronavirus is .02 and the probability that a person attending class in-person contracts the virus is .35 . (a) What is the probability that a person attending this college (either online or in-person) will contract the virus
Answer:
Probability = 0.119
Step-by-step explanation:
P (Coronavirus) = P(Person online & corona) or P(Person offline & corona)
(0.70 x 0.02) + (0.30 x 0.35)
0.014 + 0.105
0.119
Evaluate the function, find f(-2):
f(x) = 2x^2 +3x
Answer:
B) 2
Step-by-step explanation:
f(-2) = 2 * (-2)^2 + 3(-2)
f(-2) = 2 * 4 - 6
f(-2) = 8 - 6
f(-2) = 2
PLZ HELP ASAP WILL MARK U BRANLYEST... thanks:)
Step-by-step explanation:
Here we are going to use the Pythagoras theorem to get the Hight of the Television
[tex] {42}^{2} - {32}^{2} = x[/tex]
X Being the unknown side
[tex] {42}^{2} - {32}^{2} = 740 \\ x = \sqrt{740} = 27.2[/tex]
So the height is 27.2in
The Are of the screen would be L x B
27.2 x 32 = 870.2 in^2
We will use Pythagoras for the last question also
[tex] {40}^{2} + {32}^{2} = 2624 \\ \sqrt{2624} = 51.23[/tex]
She will need 51.23 in screen size
1/12 ÷ 8
Please help me :(
Answer:
1/96
Step-by-step explanation:
1/12÷ 8 = 1/96
BRAINLIEST PLEASE ANSWER PRE CALC
Factor the algebraic expression below in terms of a single trigonometric function.
sin 2x + sin x - 2 (2 points)
We know that sin (2x) = 2 sinxcosx.
So, sin (2x) + sin (x) - 2 becomes
2sin xcosx + sinx- 2.
Factor out sinx.
sinx(2cosx + 1 - 2)
sinx(2cosx - 1)
Hi I need help on this question
Answer:
Bad quality
Step-by-step explanation:
oof cant see the words 0__0
what is the solution to the equation below -5/4 x + 2/5 equals -13 / 30
Karlie has a collection of quarters, dimes, and nickels that equal $2.70. If she has 7 quarters and 7 nickels, how many dimes does she have? *
Answer:
22 Dimes
Step-by-step explanation:
Help me with this last one I don’t really get it
Answer:
Step-by-step explanation:
1. Bar graph.
2. fewer
3. more
Hope that helps!
Solve the proportion below.
Answer:
where?????????????????????:/
Answer:
i would but where it is?
Which expression is equivalent to 6-8 x 65?
Answer:
12-16 X 130
Step-by-step explanation:
Lol its asking for an equivalent expression meaning the same thing soooo... I just multiplied each number by two: 6X2= 12) 8X2=16) 65X2= 130) so the expression will be 12-16 X 65.
ps.
If u get any other answers with a different one than mine it doesnt mean its incorrect because there are infinite equivalent answers for this expression
HEEEELP PLEASE 15 POINTS
Answer:
Step-by-step explanation:
ShE JuSt WaNt My LOvE
which of the following are some of the possible soulitions for the inequality -9w < -54
the answer
w < 6
Step by Step
-9w < -54
w < -54/-9
w< 6
Laguna del carbon, a salt lake located in. Argentina, lies 344 feet below sea level. El alto, Bolivia, is located approximately 13,000 feet above sea level. What is the difference in elevation Laguna del Carbon and El Alto?
Answer:
The difference in elevation between Laguna del Carbon and El Alto is 12,656 feet.
Step-by-step explanation:
Given that Laguna del carbon, a salt lake located in Argentina, lies 344 feet below sea level, while El Alto, Bolivia, is located approximately 13,000 feet above sea level, to determine what is the difference in elevation between Laguna del Carbon and El Alto, the following calculation must be performed:
13,000 - 344 = X
12.656 = X
Thus, the difference in elevation between Laguna del Carbon and El Alto is 12,656 feet.
Answer:
The Lowest place above sea level in the Americans.
Step-by-step explanation:
I took the k12 Test
the image of (-9,-4) after a reflection over the y-axis?
Answer:
The answer is (-4,9)
Step-by-step explanation:
When you reflect across y=-x the x and y coordinates switch places and change signs.
Dom buys a stock option for $2500 that pays out 15% annual interest compounded monthly. What is Dom's balance after 6 years?
Answer:
375
Step-by-step explanation:
How many vertices are there in the graph?..
Answer: 5
Step-by-step explanation: Its simple counting btw
Find 3 ratios that are equivalent to the given ratio. 4:15
Answer: 8:30, 16:60, 32:120
WILL GIVE BRAINLIEST
Answer:
the answer it's B we got the same test
PUT THE B
Answer:
mm option a is right
Step-by-step explanation:
bcz there is only 1 zero less in weight of elephant as compared to whale hope it may help u
Angus has 5 pounds of apples. Justin has 3 pounds of apples. Who has more? How do you know?
Answer:
Angus has more apples.
Step-by-step explanation:
The apples are measured in pounds for both Angus and Justin. Angus has 5 pounds of apples, and Justin has 3 pounds of apples. 5 is greater than 3, so Angus has more apples.
Drag each tile to the correct box.
The creators of a new organic drain cleaner claim that it is more effective at reducing clogs over the long term than a general soap solution. An
Independent group recently tested the cleaner to determine whether the claims are true. Three hundred households participated and were
divided into three equal-sized groups. Half of each group was randomly chosen to use the new cleaner, and half was assigned the soap solution
The households in each group used their given method for a year. This table shows the number of households that reported a reduction in clogs
in each group
Group
Organic Drain
Cleaner
Soap
Solution
A
18
44
B
48
25
c с
36
31
Match each statement with the corresponding group.
The organic drain cleaner's claimto be more
effective than the soap solution in reducing
the development of clogs is true.
There is not enough information to validate or
invalidate the claim of the organic drain cleaner
The organic drain cleaner's claim to be more
effective than the soap solution in reducing
the development of clogs is false.
Answer: group A: The organic drain cleaners claim to be more effective than the soap solution is reducing the development of clogs is false.
group B: The organic drain cleaners claim to
be more effective than the soap solution in reducing the development of clogs is true
group C: There is not enough information to invalidate the claim of the organic drain cleaner
Step-by-step explanation:
plato/edmentum
Answer:
Group A - The organic drain cleaner’s claim to be more effective than the soap solution in reducing the development of clogs is false.
Group B - The organic drain cleaner’s claim to be more effective than the soap solution in reducing the development of clogs is true.
Group C - There is not enough information to validate or invalidate the claim of the organic drain cleaner.
Step-by-step explanation:
Plato/Edmentum
b. To solve this problem, find the ratios in each table with
number of pairs of green socks.
Answer:
Step-by-step explanation:
1 8:2
2 3:6