Swapna gathered data on the number of page views for each of her blog posts. For her 40 latest posts, she found a sample mean of 358 with a population standard deviation of 54.3. What is the approximate 95% confidence interval for her page views? HINT: It's not D.
A. 344 and 372
B. 356 and 360
C. 341 and 375
D. 336 and 380
Answers
Answer: for plato users
D. 341 and 375
Step-by-step explanation:
I just took the test
The approximate 95% confidence interval for Swapna's page views is [341, 375].
What is confidence interval?It is a range of values that's likely to include a population value with a certain degree of confidence. It is expressed as a percent (%) where a population mean lies between an upper and lower interval.A confidence interval is how much uncertainty is with any particular statistic.When it is a 95% confidence interval, it means a range of values that you can be 95% certain contains the true mean of the population.A confidence interval is obtained from the observed data that holds the actual value of the unknown parameter.Formula of confidence interval:Confidence interval = mean ± Z * (standard deviation/ √sample size)
For given question,
Sample size = 40
Sample mean = 358
Standard deviation = 54.3
Critical value at 95% confidence level= 1.96
Confidence interval = 358 ± 1.96 * (54.3/ √40)
= [358 - 1.96 * (54.3/ √40) ,358 + 1.96 * (54.3/ √40)]
= [341, 375] (approximately)
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Related Questions
Find the circumferences of both circles to the nearest tenth.
Two circles lying one inside the other. The inner circle is shaded orange and the outer circle is shaded blue. The radius of the inner circle is labeled 5 centimeters. The distance between the outer and the inner circle is circle is labeled 5 centimeters.
The circumference of the blue circle is about
cm.
The circumference of the orange circle is about
cm
Answers
Answer:
The circumference of the blue circle is about
62.8 cm.
The circumference of the orange circle is about
31.4 cm.
Step-by-step explanation:
First the blue circle, it shows that there are 5 cm on the outside of the orange circle so the would be 5+5=10, then you add the orange circle to the 10 cm, that would give you 20 cm. Then you multiply 20 cm by pi (3.14) which will give you your answer 62.8. Do the same thing for the orange circle, 5+5=10 so 10 multiplied by pi (3.14) is 31.4
bye bestie
do this for me? helppp all my point
Answers
Answer:
do u want me to find the perimeter? area? or volume?
Janice spent $36 on a cake and had $27 left. What fraction of her money did she spend on the cake?
Answers
Answer:
25%
Step-by-step explanation:
36-27= 9/36= 0.25 x 100 = 25%
Solve for x
A) 8
B) 10
C) -11
D) 5
Answers
Since the angle that equals 80 degrees is the same as the angle that equals 9x+8 that means you have 9x+8=80
9x+8=80
-8 -8
9x=72
- -
9 9
X=8
80=9x+8
Minus 8 on each side
72=9x
Divide each side by 9
8=x
What is 2x^6 times 3 ?
I will give 20 points and brainliest
Answers
Answer:
6[tex]x^{6}[/tex]
Step-by-step explanation:
8x^ 18
you can use mathw ay.com for answers
A sports store received a shipment of 150 footballs and basketballs. 20% were basketballs. How many footballs were in the shipment?
Answers
150 - 30 = 120 footballs were in the shipment.
Help!!!
Ellie and three of her friends each bought two hamburgers and a drink at the soccer game. If the drink cost $1.25 and the total cost for all four girls was $18.20, what was the cost of a hamburger?
Answers
explanation: you have to multiply 1.25 with 4 for the drink which is 5 dollars they spent. subtract the total amount( 18.20) with the 5 dollars giving you 13.2. divide 13.2 with how many burgers they got. it says they each bought two so 4 times 2. so they got 8 burgers together. ( 13.2\ 8 = 1.65)
HELP! WILL GIVE BRANLIEST!
Answers
Answer:
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I need it please I will give 20
Answers
Help me please I can’t figure it out!
Answers
Answer:
vv
Step-by-step explanation:
10.1(3) + 9.5(4) = 30.3 + 38.0
= 68.3
1. Josh is reading a book that contains 100 pages. If he reads 1/3 of the book in 1/6 of an hour, how many pages per hour does Josh read?
Answers
100/3=33.33.... 1/6= 10 mins 33.33....*6= 199.98
hope this helped you out!!
A cook makes vegetable barley soup by mixing 2 pounds of barley into 7 quarts of vegetable broth. Assume that the cook continues to use the same rate to make more batches of soup. How many pounds of barley should the cook mix with 35 quarts of broth?
Answers
Answer: The answer to this question is 10 :D
Step-by-step explanation:
The answer is 10 pounds.
2 pounds 7 quarts
4 14
6 21
8 28
10 35
Plss help me ASAP pls ASAP thank you
Answers
Which conic section is shown in the image?
A.
circle
B.
ellipse
C.
parabola
D.
hyperbola
Answers
Answer:
D. Hyperbola
Step-by-step explanation:
symmetrical open curve formed by the intersection of a circular cone with a plane at a smaller angle with its axis than the side of the cone.
The conic section in the given figure is Hyperbola. Therefore, option D is the correct answer.
In the given figure conic section is given.
What is conic section?A figure formed by the intersection of a plane and a circular cone. Depending on the angle of the plane with respect to the cone, a conic section may be a circle, an ellipse, a parabola, or a hyperbola.
The given figure an open curve with two branches, the intersection of a plane with both halves of a double cone. The plane does not have to be parallel to the axis of the cone; the hyperbola will be symmetrical in any case.
The conic section in the given figure is Hyperbola. Therefore, option D is the correct answer.
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=
O LINEAR The length of a rectangle is 6 cm longer than its width.
If the perimeter of the rectangle is 56 cm, find its length and width.
cm
Х
length: 0
width: Ich
?
cm
Answers
Answer:
I. L = 17 cm.
II. W = 11 cm.
Step-by-step explanation:
Let the length of the rectangle be L.
Let the width of the rectangle be W.
Given the following data;
Perimeter of rectangle = 56cm
Translating the word problem into an algebraic expression, we have;
L = W + 6 .....equation 1
The perimeter of a rectangle is given by the formula;
P = 2(L + W)
56 = 2(L + W) ......equation 2
Substituting eqn 1 into eqn 2, we have;
56 = 2(W + 6 + W)
56 = 2(6 + 2W)
Opening the bracket, we have;
56 = 12 + 4W
4W = 56 - 12
4W = 44
W = 44/4
W = 11 cm
Next, we would find the length of the rectangle;
From eqn 1;
L = W + 6
L = 11 + 6
L = 17 cm
In the diagram below what is the measure of X round to the nearest whole number if necessary round your answer to the nearest 10th of a unit
Answers
Answer:
C. 12
Step-by-step explanation:
Find x by applying the leg rule.
The leg rule is given as:
Hypotenuse/leg = leg/part
Hypotenuse = 24
Leg = 17
Part = x
Plug in the value into the equation:
24/17 = 17/x
Cross multiply
24*x = 17*17
24x = 289
x = 289/24
x = 12.0416667 ≈ 12 (nearest tenth)
If 5 children share 1/3 pound of candy equally, how much candy will each child get?
Answers
Answer:
Each child will receive [tex]\frac{1}{15}[/tex] of a pound
Step-by-step explanation:
[tex]\frac{1}{5*3}[/tex]
Please help, test due in 2 hours! Will give good review and brainliest. :)
Answers
It would be 86.283616915 but rounded, would be 86.
Hope this helps!
****For density you would divide mass by volume
Write a quadratic function f whose only zeros are -3 and -12
Answers
Answer:
Step-by-step explanation:
f(x) = (x + 3)(x + 12)
f(x) = x^2 + 3x + 12x + 36
f(x) = x^2 + 15x + 36
Sara has 3 choices to get to school: walk, ride a bike, or ride the bus.
She has the same choices to get home after school. If Sara randomly
chooses how she is getting to school and home, what is the probability
that she will walk to school and then ride the bus home?
Answers
Answer:
I think the answer is 1/9
Step-by-step explanation:
I did the equations by using a tree diagram to explain it but
Joseph and Ryan have 84 cards to sign. Joseph sins 1/4 of the cards. While Ryan signs 3/7. How many cards are left to be signed?
SIDE NOTE: PLEASE BE FAST!!
Answers
Answer:
27 cards left to be signed
Answer:
27 cards
Step-by-step explanation:
first we need to find what 1/4 of 84 is which will be 21 then we need to find what 3/7 of 84 is which will be 36 now we add the two getting 57 and then subtract 57 from 84 leaving us with 27 cards left. hope this helps.
im almost done with this hw. plz help!!! give explanation if you actually know the answer so ik u dont just want points
Answers
Answer:
d.
Step-by-step explanation:
odd=4/6 even=2/6
add them =6/6 which also is 9/9.
Estimate the perimeter and the area of the shaded figure
Show how u got it please.
Answers
Answer:
8(1 +√2)
Step-by-step explanation:
The perimeter is the sum of the sides of the figure
Taking 1 square box as 1 unit
Get the slant side using the pythagoras theorem;
l² = 2² + 2²
l² = 4 + 4
l² = 8
l =√8
Perimeter = 4(√8) + 4 + 4
Perimeter = 8 + 4√8
Perimeter = 8 + 4*2√2
Perimeter = 8 + 8√2
Perimeter = 8(1 +√2)
hence the perimeter of the shape is 8(1 +√2)
A circular wheel has a diameter of 42 cm. How far will it roll in 5
revolutions?
Answers
Answer:
3.142
Step-by-step explanation:
Answer:
659.75 cm
Step-by-step explanation:
First, find the circumference with the formula C = 2[tex]\pi[/tex]r
The diameter is 42 cm, so the radius will be 21 cm
Plug in the radius into the equation and solve for C
C = 2[tex]\pi[/tex]r
C = 2[tex]\pi[/tex](21)
C = 131.95
Find how far it will roll by multiplying this by 5
131.95(5)
= 659.75
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Answers
Answer:
O
Step-by-step explanation:
f the distance between two points is 9 and point one is located at (-2, 2), what could be the possible coordinates of point two?
(2, 9)
(7, 2)
(11, 2)
(2, 11) HELP NOW
Answers
Nxnhhshhchsggsxggxhzhd
Please help will mark brainliest.
Answers
Answer:
solution given.:
radius[r] =r
height[h]=1in
volume[V] of cylinder=196πin³
we have
volume[V] of cylinder=πr²h
196π=πr×1
r²=[tex] \frac{196π}{π}[/tex]
r=[tex] \sqrt{196} [/tex]
r=14in
so radius is 14in
The accompanying table shows the number of bacteria present in a certain culture over a 4 hour period, where x is the time, in hours, and y is the number of bacteria.Write an exponential regression equation for this set of data, rounding all coefficients to the nearest thousandth. Using this equation, determine the number of bacteria present after 11 hours, to the nearest whole number.
Answers
Answer:
3r1
The accompanying table shows the number of bacteria present in a certain culture over a 4 hour period, where x is the time, in hours, and y is the number of bacteria.Write an exponential regression equation for this set of data, rounding all coefficients to the nearest thousandth. Using this equation, determine the number of bacteria present after 11 hours, to the nearest whole number.
Answer: 7041 is the answer. I’m not sure how to explain. I took a lucky guess on my quizzez assignment and got it correct.
I need help plz it is just the help with the one that say write each one as a decimal
Answers
Answer:
1) 0.4552) 0.1253) 2.333Step-by-step explanation:
The explain in the photos above
I hope that is useful for you :)
Aquarium is a square prism. What is the height of the aquarium if it has a volume of three cubic units and a width of 3 feet?
Answers
Answer:
1
Step-by-step explanation:
x*3=3
x=1