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
A spherical cantaloupe is cut in half. The visible cross-section has an area of 5252 in2. The volume of the cantaloupe is _____ cm3. Round your answer to the tenths place.
Answers
Answer:
V = 286319.465 cm3
Step-by-step explanation:
First, you have to find the radius to be able to find the volume of a sphere.
The equation for the area of a circle is pi r^2 so you have to so some algebra.
5252 = pi r ^2
5252/pi = r^2
1671.76352 = r^2
sqrt(1671.76352) = r
r = 40.8872048
then you do the equation for the volume of a circle which is 4/3 pi r^3
4/3 pi (40.8872048)^3
4/3 pi 68353.7373
4/3 214739.599
286319.465
V = 286319.465 cm3
what numbers multiply to give 100 and when summed up give 25................................
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A rectangle garden is 30 feet wide if its area is 2700 ft.² what is the length of the garden?
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Answer:
The answer is 90
Step-by-step explanation:
A= L*W
so when you are given the are and the width you need to divide the area by the width to find the length
Holly has4/6quart of potato salad. She gives2/6
quart to a friend,
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Answer:
Hi! The answer to your question is [tex]1/3[/tex]
Step-by-step explanation:
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What is the value of x in the triangle?
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Answer:
17
Step-by-step explanation:
using Pythagorus theroem, you do (√514)² - 15².
This gives you 289 which you then need to square root, giving you 17
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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?
Answers
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.
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Amanda can jog 18 miles in 5 hours.
Answers
Answer:
the probelm does not make sense
Step-by-step explanation:
you can try dividing
Answer:
14.4 miles
Step-by-step explanation:
Amanda can jog 18 miles in 5 hours.
At the same rate how many miles can Amanda jog in 4 hours=??
solution:
Distance covered by Amanda in 5 hours = 18 miles
Distance covered in 1 hour = 18/5 miles
Distance covered in 1 hour is =3.6
Distance covered in 4 hours = 4*3.6=14.4
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Which number will make the two fractions
10 5
equivalent?
38 ?
OA) 2
B) 5
C) 18
D) 19
Answers
Answer:
9
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
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Create a proportion from the given set of numbers: 3,6,7,14
Answers
Answer
3:6=7:14
Step-by-step explanation:
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Need help quick please
Answers
Answer:
line 2
Step-by-step explanation:
on line 2 the two minuses at the end turn into a + (where the -2 is there should be a +2) because - x - = +
beth owes 17000 on her car loan. the interest rate on her loan is 4.25% she will be paying this loan off in 4 years how much will beth pay all together?
28,900
19,890
2890
45,900
Answers
Answer:She has to pay $20078.7 amount.
Step-by-step explanation:
Given : Beth owes 17,000 on her car loan. The interest rate on her loan is 4.25% She will be paying this loan off for 4 years.
To find : How much will she pay altogether?
Solution :
Using compound interest formula,
A = P(1 + r)
Where A is the amount
P is the principle P=17,000
P is the rate r=4.25%=0.0425
t is the time t= 4 years
Substitute the value,
Therefore, She has to pay $20078.7 amount.
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Answer:
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Step-by-step explanation:
The inverse of division is multiplication
The inverse of addition is subtraction
The inverse of multiplication is division
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Matthew bought flowers for his mother. Exactly 1/4 of the roses were white. How many roses were white?
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Answer:
1/4
Step-by-step explanation:
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Answer:
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Step-by-step explanation:
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an item is regularly priced at 29. Joe bought it at a discount of 45% off the regular price.
Answers
Answer:
$13.05
Step-by-step explanation:
The prize will be $13.05 after the discount.
29x45%=13.05
OR
29x0.45=13.05
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Use exact number
Y=_x+_
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Answers
Answer:
1.5x+3
Step-by-step explanation:
......
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..........
write down the number in a condensed form:
200 + 40 + 5 +0.3 + 0.07
Answers
Answer:
answer is 240.37
Step-by-step explanation:
i added each one together add the ends and then got 240.37 (btw I'm in 4 grace)
The condensed form of the given expression 200 + 40 + 5 +0.3 + 0.07 is 245.37.
Given expression is [tex]200 + 40 + 5 +0.3 + 0.07[/tex]
It is required to find condensed form.
What is condensed form of an expression?Condensed form is the representing the expression in the composite way.
By solving the expression
[tex]=200 + 40 + 5 +0.3 + 0.07[/tex]
[tex]=245.37[/tex]
Thus, the condensed form of the given expression is 245.37.
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Find 50% of 152:
Find 25% of 152:
Find 75% of 152:
Answers
50% of 152 = 76
25% of 152 = 38
75% of 152 = 114
Sorry if im wrong
Answer:
76
38
114
Step-by-step explanation:
50% of 152
= ( 50 / 100 ) x 152
= ( 1 / 2 ) x 152
= 152 / 2
= 76
25% of 152
= ( 25 / 100 ) x 152
= ( 1 / 4 ) x 152
= 152 / 4
= 38
75% of 152
= ( 75 / 100 ) x 152
= ( 3 / 4 ) x 152
= ( 3 x 152 ) / 4
= 3 x 38
= 114
Sam is making a picture frame. He is gluing craft sticks end-to-end to a piece of cardboard. The sticks do not overlap. The top of the frame is 18 and one-third inches long. Each craft stick is 3 and one-third inches long.
How many craft sticks will Sam glue to the cardboard to make the top of the frame?
Answers
Answer: 5 1/2
Step-by-step explanation:
I took the test ig, but im not 100% sure
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Answers
Answer:
5,090,039
Step-by-step explanation:
Are you trying to number it out?
Answer:
5,090,039
Step-by-step explanation:
Just separate them, do them one at a time and add them all together
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Answer:
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Step-by-step explanation:
The perimeter of a triangle is 9.12 yards.
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By using Pythagoras theorem, we get
c²=4²+1²
c²=17
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= 9.12 yd
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A)
X-63 = 150
B)
x+63 = 150
X + 150 = 63
D)
X - 150 = 63
Answers
Answer:
B.
Step-by-step explanation:
x+63=150
x+63-63=150-63
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Answer:
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Answer:
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There are 90 kids in the band. 20% of the kids own their instruments, and the rest rent them. What percentage of kids either rent or own and instrument
Answers
Answer:
im conufesed
Step-by-step explanation:
Answer:
18 kids own their own instruments
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Step-by-step explanation:
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A zoologist studied the wild cat population of two islands during a four year span - Meow Island and Purr Island. She collected the following data about the population.
1. How would you describe the growth of each island ?
2. Which do you think will be modeled by a linear function ?
Answers
Answer:
Meow Island has a linear function.
Step-by-step explanation:
Meow Island increases by multiply the input by 3 for each coordinate. On the other hand, Purr Island increases by adding 4. Linear functions increase with multiplication, not by addition, and so Meow Island increases linearly.
5. In quadrilateral RSTW. diagonals RT and SW are perpendicular bisectors of
each other, Quadrilateral RSTW must be a
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a,
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d. 1. I, and I
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Answer:
Rhombus and/or Square
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Part A
At most, Marc can spend $50 on sandwiches and chips for a picnic his art club is having. He already bought chips for $6 and will buy sandwiches that cost $4.50 each. Write an inequality to show how many sandwiches (s) he can buy.
Part B
Solve the inequality to show the maximum amount of sandwiches he can buy.
Answers
Part A: y=4.50x+6
Part B: $46.50=4.50(9)+6
Marc can buy up to 9 sandwiches ($40.5) plus chips ($6) without going over $50.
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Answers
Answer: 2(3x+1)
Step-by-step explanation:
2(3x+1) ==> 2(3x)+2(1)
6x+2
Answer:
2(3x + 1)
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Step-by-step explanation:
