2
Select the correct answer.
Which value is needed to determine a confidence interval for a sample mean?
OA
the margin of error for the proportion
ов.
the population size
OC.
the sample proportion
OD
the standard error of the mean
Answers
Answer:
D. the standard error of the mean
Step-by-step explanation:
trust me i got it right Plato
The value needed to determine a confidence interval for a sample mean is the standard error of the mean option (D) is correct.
What is a confidence interval for population standard deviation?It is defined as the sampling distribution following an approximately normal distribution for known standard deviation.
The formula for finding the confidence interval for population standard deviation as follows:
[tex]\rm s\sqrt{\dfrac{n-1}{\chi^2_{\alpha/2, \ n-1}}} < \sigma < s\sqrt{\dfrac{n-1}{\chi^2_{1-\alpha/2, \ n-1}}}[/tex]
Where s is the standard deviation.
n is the sample size.
[tex]\chi^2_{\alpha/2, \ n-1} and \chi^2_{1-\alpha/2, \ n-1}[/tex] are the constant based on the Chi-Square distribution table:
α is the significance level.
σ is the confidence interval for population standard deviation.
Calculating the confidence interval for population standard deviation:
We know significance level = 1 - confidence level
It is given that:
The value needed to determine a confidence interval for a sample mean is the standard error of the mean.
CI = X + Z(s/√n)
Here CI is the confidence interval
Z is the confidence level
X is the sample mean
Thus, the value needed to determine a confidence interval for a sample mean is the standard error of the mean option (D) is correct.
Learn more about the confidence interval here:
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Related Questions
Complete the square to re-write the quadratic function in vertex form:
y = x2 – 7x - 6
Answers
Answer:
y = (x - 3.5)^2 - 18.25
Step-by-step explanation:
y = x^2 – 7x - 6
y = (x^2 – 7x) - 6
y = (x^2 – 7x + 3.5^2 - 3.5^2) - 6
y = (x^2 – (2)(3.5)x + 3.5^2) - 3.5^2 - 6
y = (x - 3.5)^2 - 3.5^2 - 6
y = (x - 3.5)^2 - 18.25
In ΔEFG, the measure of ∠G=90°, GE = 2.1 feet, and EF = 4.8 feet. Find the measure of ∠F to the nearest degree.
Answers
Answer:
26 degrees
Step-by-step explanation:
Answer:
2.6 degrees
Step-by-step explanation:
A car dealership decreased the price of a certain car by 4% . The original price was $39,200.
Answers
Answer:
37,632
Step-by-step explanation:
Subtract 4% from 39,200 and you'll get 37,632
I NEED AN ASNWER ASAP!!!!
Which inequality is represented by this graph?
x greater-than negative 53
x less-than-or-equal-to negative 53
x less-than negative 53
x greater-than-or-equal-to negative 53
Answers
Answer:
X is greater than negative 53
which of the following is an identity?
Answers
Answer:
B
Step-by-step explanation:
Tanx=sinx/cosx
Cotx=cosx/sinx
If 5% of the students transferred into the school, how many students transferred in if there is
a total of 60 students? *
Answers
Answer: 3
Step-by-step explanation: 60 + 5% is 63 so if you subtract the 3 instead of adding it you get 57 meaning 3 of the 57 are transfer students
Maggie Jay owns her own car. Her June monthly interest was $250. The rate is 13 1/2 percent. Jay's principal balance at the beginning of June is: (Use 360 days)
Answers
Answer:
the principal balance at the beginning of June is $22,222.22
Step-by-step explanation:
The computation of the principal balance at the beginning of June is shown below:
Principal balance = Interest paid ÷ (Interest Rate ÷ 12 Months)
= $250 ÷ (13.5% ÷ 12)
= $22,222.22
Hence, the principal balance at the beginning of June is $22,222.22
x-14=-9 what is the solution to this equation?
Answers
Answer:
x=5
Step-by-step explanation:
-9+14=5
Answer:
5
Step-by-step explanation:
5-14=-9
x=-9=14
x=5
Bailey works at the donut shop and saves 10% of each paycheck. She put $12.50 into her savings account out of her most recent paycheck. What was the amount of
Bailey's most recent paycheck?
$1250.00
Answers
Answer:
125$
Step-by-step explanation:
1250/10=125
Answer:
$125
Step-by-step explanation:
$1250 ÷ 10 = $125
The first is 4 inches wide and 15 inches long. The second is 9 inches wide. Find the length of the second rectangle. A 6.67 inches B 2.4 inches C 41 inches D 33.75 inches
Answers
Answer:
D - 33.75
Step-by-step explanation:
If the rectangles are similar, then you can use this cheat:
Width:
9/4 = 2.25
2.25 is the scale factor between the two rectangles.
Using the new-found scale factor, you can do this:
15 x 2.25 = 33.75
This means the length on the second rectangle is 33.75 inches long.
Hoping this helps you! :)
Question 4 ( i-Ready )
The system of equations 2y = 14 - 2x and y = -x + 7 is
graphed. What is the solution to the system of equations?
A. (0,-7)
B. No solution
C. (0,0)
B. Infinitely many solutions
Answers
Answer:
Step-by-step explanation:
Note that the two equations are equivalent.
2y = 14-2x can be rearranged to y = -x+7, which is the same as the second equation. What you're looking is one line on top of the other.
Every shared point is a solution. Since there are infinitely many points on a line, and these lines share every point, there are infinitely many solutions.
2x+a=5-bx
PLEASE HELP THIS IS SUPER URGENT.... WHOEVER ANSWERS WILL BE MARKED BRAINLIEST
Answers
Answer:
If x is 4 and b is 6 the equation would have one solution
if x is 7 and b is 5 the equation would have no solutions
if x is 8 and b is 6 the equation would have infinitely many solutions
Step-by-step explanation:
i meant to type a.
just pretend x = a
mark me as brainliest pls
what do the numbers 13%, 10%, 0.125, and 1/5 have in common
Answers
We have that what 13%, 10%, 0.125, and 1/5 have in common is
These are all numbers less than 1 as the are all decimal of "0."
From the Question we are told that
13%, 10%, 0.125, and 1/5 are number given
We must note that
These are all numbers less than 1 as the are all decimal of "0."
13%, =0.13
10%, =0.10
0.125,=0.125
1/5=0.2
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David drove 580 km on 7 hour journey. on the city roads he drove 60km/h and on the he drove 100km/h. How long did he drive at each rate?
Answers
Answer:
3 hours on the city roads and 4 hours on the other roads
Step-by-step explanation:
580 (total miles driven) - 400 (4 hours of driving 100km/h) = 180 (miles left)
180 (miles left to drive) / 60 (km/h) = 3 (hours driven at the speed of 60km/h)
I hope this helps :)
Help me as much as you can please :)
Answers
Answer:
Step-by-step explanation:
1). System of equations is,
-2x - y = -22 -------(1)
4x - 8y = 4 -------(2)
By satisfying these equations with the given point (9, 4),
Equation (1)
-2(9) - 4 = -22
-18 - 4 = -22
-22 = -22
True.
Equation (2)
4(9) - 8(4) = 4
36 - 32 = 4
4 = 4
True.
Given point lies on both the equations.
Therefore, the given point is the solution of the system of equations.
2). 3x - 3y = 27 -----(1)
-2x + 9y = -11 ------(2)
Satisfy the equations with the given point (-10, -1)
Equation (1)
3(-10) - 3(-1) = 27
-30 + 3 = 27
-27 = 27
False.
Equation (2)
-2x + 9y = -11
-2(-10) + 9(-1) = -11
20 - 9 = -11
11 = -11
False.
Therefore, the given point is not the solution of the system of equations given.
PLEASE HELP ASAP is this relationship linear, exponential, or neither?
Answers
Answer:
neither
gfhhhufkufjkg
what is the standard form of y= 2/3x + 6
Answers
Answer: 2x/3 +6
Step-by-step explanation: You have to combine 2/3 and x to get 2x/3+6
-2x+3y=18
Explanation:
y=2/3x+6 multiply both side by 3 to get rid of fraction
3y=2x+18 flip
2x+18=3y
2x-3y= -18 multiply both side by -1
-2x+3y=18
What’s the equation of a line with an undefined slope passing through (-1,7)
Answers
Answer:
y=7
Step-by-step explanation:
Micah needs to buy some new shoes for football. At the sporting goods store, he finds 2 shoe pairs on sale for $24.80 each. He buys them both and finds out that he saved a total of $22.38. If he saved the same amount on each pair, what was the original price of each shoe pair? (my friend asked this question lol i need to know)
Answers
Answer:
$35.99
Step-by-step explanation:
He saved 22.38 so divide by two and you get 11.19 and add that to the price of each shoe on sale you get 35.99
Answer:
$35.99
Step-by-step explanation:
22.38 divide by two equals 11.19 and add the price of each shoe on sale
witch you get $35.99
The unit of ratio is expressed in
a) Metre
b) Gram
Answers
Can someone answer this question if you know the answer.
Answer choices:
A. 1/20
B. 40%
C. 1/40
D.50%
Answers
Answer:
It's C
Step-by-step explanation:
Pls pls pls pls I will mark you Brainest.
Answers
Answer:
1) 2
2) 3
3) 4
4) 5
Step-by-step explanation:
Plug in the c variables in the table into the equation to find w.
ANSWER QUICKLY FOR A BRAINLIEST !! AND LOTS OF POINTS
Answers
Answer: 124 ft after 0.5 seconds
Step-by-step explanation:
Find h(0.5)
h(0.5) = -16(0.5)^2 + 64(0.5) + 96
-16(0.25) + 64(0.5) + 96
-4 + 32 + 96
124
Answer:
thanks for points
Step-by-step explanation:
If I had 60 units needed and units per case was 14 how many cases and additional units I got
Answers
Answer:
4 with a remainder of 4
Step-by-step explanation:
60 divided by 14 is 4 with a remainder of 4
The additional number of units required is 10 units.
Given that:
Total number of units needed = 60 units
Total number of units per case = 14
How to find the total number of cases required for the given question?So, the total number of cases required=Number of units needed / number of units per case.
Number of cases required = 60/14 = 4.285 (this means that 5 cases are required as 4 cases won't be up to 60 units)
With 5 cases, we have exceeded the required units needed :
Additional units will be : (14×5) - 60
Additional units = 70 - 60 = 10 units
Therefore, the additional number of units required is 10 units.
To learn more about the unitary method visit:
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X + 4 < 6 help.......
Answers
Answer:
x<2
Step-by-step explanation:
Hello There!
Our objective for this problem is to isolate the variables
To do so we use inverse operations
x+4<6
subtract 4 from each side
4-4 cancels out
6-4=2
we're left with
x<2
Step-by-step explanation:
It is just like a normal x equation just with an inequality. So for now, just represent the < as and =
so we have x+4=6
subtract 4 from both sides
x+4-4=6-4
x=2
Now we insert the <
x<6
so all values for x are all less than 6
Hope that helps :)
please help does anyone know this
answer choices
1. 65
2. 20
3. 35
4. 70
Answers
Answer:
70
Step-by-step explanation:
Hello There!
So if you didn't know an exterior angle of a triangle is equal to the two opposite interior angles of a triangle
So basically
∠XYZ=∠WXY+∠XWY
so to find ∠XWY we subtract the value of ∠WXY (45) from the value of the exterior angle (115)
115-45=70 so ∠XWY=70
Answer:
?+45=115° sum of two interior angle of the triangle is equal to the exterior angle
<XWY=115-45=70
please help me someone
Answers
WILL MARK BRAINLYEST AND 40 POINTS
Answers
Answer:
B
Step-by-step explanation:
Answer:
Distributive Property
Step-by-step explanation:
This is distributive property because you are distributing the 5 by multiplying it by the variables in the parenthesis.
Faith wants to use the formula C(f) = 59(f - 32) to convert degrees Fahrenheit, f, to degrees Celsius, C(f). If Faith calculated C (68), what would her result be?
Answers
Answer:
I don't understand what the problem is saying... 2124...95...
Step-by-step explanation:
elmedico ha recetado a luis un frasco de 24 vitaminas con las siguientes indicaciones. La semana 1 debe tomar la cuarta parte de las vitaminas, la semana 2 debe tomar 2/3 de las vitaminas restantes y la semana tres el resto ¿cuantas vitaminas toma cada semana?
Answers
Answer:
I don't know this answer
Answer:
Ya no hay
Step-by-step explanation: