Answer:
the answer is 18y thank me later mate
A paint manufacturer wants to determine the average drying time of a new interior wall paint. For n = 50 test areas of equal size he obtained a sample mean drying time of ¯x = 63.3 minutes and a sample standard deviation of s = 8.4 minutes. (a) (5 points) Construct the 95% confidence interval for the true mean µ. (b) (5 points) Suppose the population has a normal distribution, construct the exactly 95% confidence interval for the true mean µ. (c) (5 points) Suppose the population has a normal distribution, construct the 95% prediction interval for a new observation.
Answer:
a) the 95% confidence interval for the true mean µ is 60.971, 65.629
The exact 95% confidence interval for the true mean µ is 60.971, 65.629
P (x`- ∝ s/√n<u <x`+ ∝ s/√n) = 0.95
Step-by-step explanation:
n= 50
x`= 63.3
s= 8.4 minutes
∝= 95%= ±1.96
The formula for calculating the confidence interval is:
x`± ∝ s/√n
Putting the values
x`± 1.96 s/√n
63.3 ± 1.96(8.4/√50)
63.3± 2.3287
60.971, 65.629
a) the 95% confidence interval for the true mean µ is 60.971, 65.629
b) Putting the values
x`± 1.96 s/√n
63.3 ± 1.96(8.4/√50)
63.3± 2.3287
The exact 95% confidence interval for the true mean µ is 60.971, 65.629
c) The prediction level tells that the drying time of the wall from 60.971 to 65.629 minutes must be in the range 95 % of the time.
And is given by
P (x`- ∝ s/√n<u <x`+ ∝ s/√n) = 0.95
Work out m and c for the line:
y = x + 3
Step-by-step explanation:
Given equation
y = x + 3
Comparing with y = mx + c so
Slope (m) = 1
y-intercept (c) = 3
Hope it will help :)❤
Answer:
I don’t know if this is right, but I hope this helps!
Step-by-step explanation:
A jar contains 8 red marbles, 10 blue marbles, and 2 yellow marbles. One marble is chosen at random. The color is recorded in the table and then it is returned to the jar. This is repeated 40 times. What is the experimental probability of choosing a yellow marble? Express your answer as a percent to the nearest whole number.
RED/14 BLUE/16 YELLOW/10
Answer:
1/4 or 25%Step-by-step explanation:
Experimental probability:
Pe = number of event occurred / number of attemptsProbability of yellow:
Pe(yellow) = 10/40 = 1/4 = 25%10 Mrs. Randall bought tickets to the art museum for all the fifth-grade students. Each ticket cost $12, and the total cost of the tickets was $1,152. How many fifth-grade students are there?
Answer:
Step-by-step explanation:
12s=1152 (divide each side by 12 to isolate s)
s=96
So there were 96 students.
Find the lateral surface area of the figure below. Round the the nearest tenths place.
help please !
Round the fraction to 0, 1/2, or 1.
2/9
Can I please have help I will mark brainly est
Answer:
Hey mate......
Step-by-step explanation:
This is ur answer......
I believe its SQUARE! Cuz it says 4 right angles.....Hope it helps!
mark me brainliest pls.....
Follow me! :)
Guided Practice
Directions: Describe each pair of ratio. Write P if it is a proportion and NP if
not proportion.
1.) 4:6 = 20:24
2.) 9: 6 = 36:24
3.) 2:5 = 15:45
4.) 3:5 = 6:10
5.) 40: 16 = 5:2
Answer:
1) NP
2) P
3) NP
4) P
5) P
Step-by-step explanation:
re-write all the pairs into fractions
1.) [tex]\frac{4}{6} =\frac{20}{24}[/tex] {4 x 5 = 20} and {6 x 4 = 24} 5 ≠ 4
(basically both the underlined numbers need to be the same)I can do an explanation for each one if you need; just comment, cause I'll be on here for a while. Good luck! :D
What is the definition of an irrational number?
A.
a negative number
B.
a number that can be expressed as a fraction, , where p and q are integers and q is not equal to zero
C.
a number that cannot be expressed as a fraction, , where p and q are integers and q is not equal to zero
D.
a number that can be written as a fraction but not as a decimal
Write the algebraic expression:
99 times the sum of y and 9
HELpPppPppPppPpppPppPppppppppppppppppppoopppppoppopppppppppp
Jdjxjjxx
Answer:
£140
Step-by-step explanation:
First count up the amount of full squares, then you see the partially filled squares and try find the match for it to fill the square. It ends up being 24 squares, meaning 24 square feet. That multiplied by £5, as that is the cost of red wood, gives you the answer of £140
y=3/2x-9
I need to find the x-intercept and the y-intercept with work plsss
Hi there!
x-int: (6, 0)
y-int: (0, -9)
y = 3/2x - 9
Begin by finding the x-intercept. The x-intercept is located where y = 0, therefore:
0 = 3/2x - 9
Isolate for x by adding 9 to both sides:
9 = 3/2x
Divide both sides by 3/2x:
9 * 2/3 = x
x = 6. Thus, the x-intercept is at (6, 0).
Find the y-intercept by finding the y-value at which x = 0:
y = 3/2(0) - 9
y = -9. The y-intercept is at (0, -9).
Which point is on the graph of y = 4x + 2? A (-2, -5 o B. (-4, -15) C. (4. 18) D. (0.1)
Answer:
The answer should be C
Step-by-step explanation:
I hope that helps you!
Graph the inequality p < -8
Please leave an answer! I’ll give brainlist
Answer:
start from 0 then take the line going to the left put it at 0 and drag it to -8
Step-by-step explanation:
(Urgent) Worth 10 points 7.3
Answer:
m∡CBD = 135°
Step-by-step explanation:
m + 3m = 180
4m = 180
m = 180/4
m = 45
angle CBD is 3(45) = 135 degrees
quanto é dois mais dois divido por dois
Answer:
la respuesta es 2 (dois)
The baseball player threw the ball 30 feet to his teammate. How far would the throw be if measured in yards?
Answer:
10
Step-by-step explanation:
to convert to yard from feet you have to divide by 3
30/3-10 so he through the ball 10 yards
have a great day :D
WEEEEEEEEELLLLLLLLLLLL What is 1+1 :0 too confusion for my 1 braincell
Answer:
WELLLLLLLLLLLLLLLLLLLLLL it's 11 obviously. (or 2 ;P)
Step-by-step explanation:
i have 1/2 of a braincell :)
Answer:
1 + 1 is 2 BUT
2 + 2 is 5 ILLUMIATI CONFIRMED!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Step-by-step explanation:
Plz help if correct ill give Brainlyest
Answer:
taena mo
Step-by-step explanation:
taenamo bubung yawa
Evaluate-n, when n=-4
Answer:
4
Step-by-step explanation:
-n =
-(-4) =
+4 =
4
Hope that helps!
-Sabrina
find the length of AD. HELP MEEEE
Answer:
5.42
Step-by-step explanation:
hope this helped!! :)
Find the value of x.
Pleaseeee I needddd helpppp!!!!!!
Answer:
x = 40
Step-by-step explanation:
Measure of an external angle of a circle = ½(difference of the intercepted arcs)
This means that:
½(PQ - RS) = m<T
m<T = x/2
PQ = (x + 70)°
RS = (x + 30)°
Plug in the values
½((x + 70) - (x + 30)) = x/2
½(x + 70 - x - 30) = x/2
½(x - x + 70 - 30) = x/2
½(0 + 40) = x/2
½(40) = x/2
20 = x/2
Multiply both sides by 2
20*2 = x
40 = x
x = 40
Find the area of the figure shown below and chose the appropriate result
Answer:
it's the first option or A
Step-by-step explanation:
well 9 * 10 is 90 which leaves you with the numbers 14 and 3 we used 10 so that gives us 4 and 3 multiply those and you get 12 so add 12 to 90 and you get 102 thus the answer is A
A baseball team has scheduled its opening game for April 1. If it rains on April 1, the game is postponed and will be played on the next day that it does not rain. The team purchases insurance against rain. The policy will pay 1000 for each day, up to 2 days, that the opening game is postponed. The insurance company determines that the number of consecutive days of rain beginning on April 1 is a Poisson random variable with mean 0.6.
Required:
What is the standard deviation of the amount the insurance company will have to pay?
The amount that Jimmy paid for his meals the four days, $6.45, $21.38, $1.99, $7.99, $16, $0, $7.99, $18.95, $4.30, $10.35, $18.20. Calculate the median
Answer:
$7.99
Step-by-step explanation:
Arrange numbers in numerical order: $0, $1.99, $4.30, $6.45, $7.99, $7.99, $10.35, $16, $18.20, $18.95, $21.38.
Count how many numbers you have, 11.
11 is an odd number so, the number in the middle of the data set is the median.
Final answer: $7.99 is the median.
I don’t get this lol can someone tell me the answer ?
Answer:
8 miles
Step-by-step explanation:
when its 3.5hours look to the left which is 8 miles
Please no links, will report!
9514 1404 39318
Answer:
XY = 11.25
Step-by-step explanation:
Corresponding sides are proportional, so ...
XY/AB = XZ/AC
XY = (AB)(XZ/AC) = 5(18/8)
XY = 11.25
in a decimal[tex]\\4\frac{1}{5} \f}[/tex]
What is equivalent to 0 = 2x2 - 16x – 18 when completing the
square?
Answer:
x = 1
x = -9
Step-by-step explanation:
(2x2 + 16x) - 18 = 0
2x2 + 16x - 18 = 2 • (x2 + 8x - 9)
x2 + 8x - 9
-9 + 1 = -8
-3 + 3 = 0
-1 + 9 = 8
2 • (x + 9) • (x - 1) = 0
2 = 0
x+9 = 0
x = -9
x-1 = 0
x = 1
x2 + 8x - 9 = 0
x2+8x = 9
(x+4) • (x+4) =
(x+4)2
x2+8x+16 = 25 and
x2+8x+16 = (x+4)2
(x+4)2 = 25
x = -4 + √ 25
x2 + 8x - 9 = 0
has two solutions:
x = -4 + √ 25
or
x = -4 - √ 25
- B ± √ B2-4AC
x = ————————
2A
A = 1
B = 8
C = -9
B2 - 4AC =
64 - (-36) =
100
-8 ± √ 100
x = —————
2
x = ( -8 ± 10) / 2
x =(-8+√100)/2=-4+5= 1.000
or:
x =(-8-√100)/2=-4-5= -9.000
Answer: x = 1
x = -9
Which expression is equivalent to 4(5r+9)?