Answer:
a) ( 31.92 < μ < 33.88 )
The confidence interval is not very different from the confidence interval given in the question
b) ( 31.74 , 34.66 )
Step-by-step explanation:
n = 250
x ( mean ) = 32.9
std = 6.9
95% confidence interval
df = n - 1 = 250 - 1 = 249
a) construct confidence interval estimate
calculate for the margin of error
= [tex]t_{0.05/2} ,_{250-1} ( \frac{s}{\sqrt{n} } )[/tex] ( using excel function: T.INV.2T(0.025,249) )
= 2.255 ( 6.9 / 15.81 )
= 0.98
Hence the confidence interval for the population
= ( x - 0.98 < μ < x + 0.98 )
= ( 31.92 < μ < 33.88 )
The confidence interval is not very different from the confidence interval given in the question
b) when n = 19
x = 33.2 and std = 2.6
margin of error = [tex]t_{0.05/2} ,_{19-1} ( \frac{s}{\sqrt{n} } )[/tex] = 2.45 * ( 2.6 / 4.36 ) = 1.46
confidence interval
= ( 33.2 - 1.46 , 33.2 + 1.46 )
= ( 31.74 , 34.66 )
What is equivalent to x+y+x+y+3(y+5)?
Answer:
this simplified would be 2x+5y+15
Step-by-step explanation:
How many solutions will the equation have?
| x – 2| = 6
Answer:
2
Step-by-step explanation:
Answer:
2 solutions I believe. 2 different x values.
Find the probability of each event.
1) An archer has a 25% chance of hitting the
bullseye on a target. What is the
probability that the archer will hit the
bullseye exactly three out of five times?
Answer: Don’t listen to the other comment it’s a scam. It’s 15 percent. Or 0.15
Step-by-step explanation:
A large water tank holds 295 liters of water.
A second large tank holds 318 liters of water.
How many liters of water are in both tanks?
If angle 1 & 2 are complementary angles, they add up to 90 degrees.
A. True
B. False
Answer:
true lol
Step-by-step explanation:
What is the slope of the line in the graph?
Put the correct answer for but if I check the answer and the answer is wrong then i´m going to report you!
Answer:
It’s C
Step-by-step explanation:
Why because it’s is
Dream should do a facial revile
is {(98,6),(99,0),(100,7)} a function?
Answer:
Yes , this is the function
Step-by-step explanation:
Because every domain has their only one image
Consider the following time series data. Week 1 2 3 4 5 6 Value 18 12 15 10 18 14 Using the naive method (most recent value) as the forecast for the next week, compute the following measures of forecast accuracy. (a) mean absolute error MAE = (b) mean squared error MSE = (c) mean absolute percentage error (Round your answer to two decimal places.) MAPE = % (d) What is the forecast for week 7?
Answer:
(a) MAE = 5.20
(b) MSE = 10
(c) MAPE = 38.60%
(d) Forecast for week 7 = 14
Step-by-step explanation:
Note: See the attached excel for the calculations of the Error, Error^2, and Error %.
(a) mean absolute error
MAE = Total of absolute value of error / Number of observations considered = |Error| / 5 = 26 / 5 = 5.20
(b) mean squared error
MSE = Total of Error^2 / Number of observations considered = Error^2 / 5 = 150 / 5 = 10
(c) mean absolute percentage error (Round your answer to two decimal places.)
MAPE = Total of Error % / Number of observations considered = Error % / 5 = 193.02 / 5 = 38.60%
(d) What is the forecast for week 7?
Since the forecast is based on the naive method (most recent value), the forecast for week 7 is value for week 6. Therefore, we have:
Forecast for week 7 = 14
giving brainliest !!!!!!!
Answer:
368
Step-by-step explanation:
I NEED HELP PLEASE NO LINKS OR U WILL GET REPORTED. I WILL GIVE BRAINLY THING, make sure you are correct
Answer:
D
Step-by-step explanation:
French colonies were north of the US. Portugal only owned Brazil, and Germany had no colonies.
If cos circle = 2/-5 and tan circle > 0, what is the value of sin circle
Step-by-step explanation:
hope this help ! have a great day
Solve for x then find each angle measure
What is the volume of the square pyramid ?
Answer:
Step-by-step explanation:
The answer is 4230
The lateral surface area of a triangular prism is 120 in?. If the perimeter of the base is
20 inches, what is the height?
Answer:
6
Step-by-step explanation:
I need this plz help
Answer:
D
Step-by-step explanation:
Its roating clockwise 90 degrees
The bank has 5 Vaults.Each vault contains 5 drawers 5 stacks and $25 what’s in the bank?
f a circle has a diameter of 13 dm, then the radius of the circle is _____ dm.
Answer:
Step-by-step explanation:
What is the radius of a circle whose diameter is 13 units? This means that the diameter is double the length of the radius. To find the radius, do: ∴, the radius is 13 2 units or 7.5 units.
Answer:
6.5dm
Step-by-step explanation:
Diameter is twice radius
radius =13÷2
radius =6.5dm
WILL MARK BRAINLEST
This table shows a proportional relationship. x −4 −2 0 2 4
y −14 −7 0 7 14
Which ordered pair could also belong to this relationship?
A. (−6, 21) C. (−1, −3)
B. (1, 3) D (6, 2)
Answer:
D (6, 21)
Step-by-step explanation:
Since the ratio of the corresponding values of x and y given in the table is 2 : 7
So, 6/ 21 = 2/7 = 2: 7
Thus, D (6, 21) is the correct answer.
I NEED HELP PLEASE HURRY
Answer:
60m2
Step-by-step explanation:
(12x4)+(4x3)=60
Please give brainliest if this helps :)
A bag contains 3 teal balls and 2 magenta balls. Blake picks one ball, replaces it, and then picks another ball. What is the probability that both balls are teal?
4/25
9/25
3/10
1/10
Jack invested $2,900 in an account paying an interest rate of 8 % compounded
annually. Anthony invested $2,900 in an account paying an interest rate of 81%
compounded continuously. After 10 years, how much more money would Anthony
have in his account than Jack, to the nearest dollar?
I don’t understand how to solve.
Answer:$451
Step-by-step explanation:
HELP ME ASAP!!!!! Jack bought an automatic water bottle feeder for his cat. A diagram of the bottle is shown below. What is the maximum amount of water the bottle can hold?
Answer:
16 in
Step-by-step explanation:
theo is paid £12.50 per hour. how much will he be paid for working 6 hours and 30 minutes?
Answer:
he pay 12.50 in 60 min
Step-by-step explanation:
he pay x in 390 min
x=(12.50 x 390)÷ 60
x=4875 ÷60
x=81.25 £
he pay finally £81.25
4. Which of the following indicates the multiplication property of equality when solving Vz= 5?
O A.Y2 = 2(5)
O B.2V) = 5
O C.212) = 2(5)
O D.V2 = 5/2
Answer:
D. 21.
Step-by-step explanation:
The general form of the equation of a circle is:
(x - a)^2 + (y - b)^2 = r^2 where r is the radius.
Comparing:
(x + 5)^2 + (y + 7)^2 = 21^2
So r^2 = 21^2
making r = √21^2
= 21.
plz make me brainliest
What is the fraction equivalent of 430%
NO LINKS. IF WRONG I WILL DELETE.
Answer:
The answer is 43/10
Hope this helps
5 oranges are bought for $4.00 and later sold at $0.10 each .find the loss percent.
Answer:
3.50 loss of percent
Step-by-step explanation:
loss
------- ×100
c.p.
Help with math please, just 7 and 9. Please explain thanks.
Answer: #7 x=16 #9 x=27
Step-by-step explanation:
#7
This is an isosceles triangle, so the angles formed at the base of the congruent sides are equal.
5x-7=8x-55
48=3x
16=x
#9
This is an equilateral triangle (if 2 angles are 60, the third has to be 60 as well) so the sides are equal
7x+19=11x-89
108=4x
27=x
Write the ratios for sin X and cos X.
9514 1404 393
Answer:
sin(X) = (√119)/12
cos(X) = 5/12
Step-by-step explanation:
The mnemonic SOH CAH TOA can help you remember the relevant ratios.
Sin = Opposite/Hypotenuse
sin(X) = YZ/YX
sin(X) = (√119)/12
__
Cos = Adjacent/Hypotenuse
cos(X) = XZ/XY
cos(X) = 5/12
A line passes through the point (6,-4) and has a slope of 3/2 I Write an equation in point-slope form for this line.
Answer:
y-4=3/2(x+4)
Step-by-step explanation:
If you plug the numbers into the equation (y-y1=m(x-x1)), you get y-4=3/2(x+4).
HOPE THIS HELPS