Answer: 0.670
Step-by-step explanation:
Given that :
Population mean (μ) = 11.5
Sample size, n = 22
Sample mean, x = 11.7
Standard deviation, s = 1.4
The test statistic ;
Tstat = (x - μ) / (s/√n)
Tstat = (11.7 - 11.5) / (1.4/sqrt(22))
Tstat = 0.2 / 0.2984810
Tstat = 0.6700594
Tstat = 0.670 (3 decimal places )
1.6[7-4m]=30
2.[5+6a]-3=8
Answer:
(a,m=(-1499/1812, 1/2)
Step-by-step explanation:
hope this helps!
xy = -9
Linear
Or nonlinear
Use the compound interest formula to compute the total amount accumulated and the interest earned.
$2000 for 4 years at 6% compound quartley
Answer:
100
Step-by-step explanation:
100
A sample of 173 students using Method 1 produces a testing average of 88. A sample of 127 students using Method 2 produces a testing average of 53.5. Assume the standard deviation is known to be 12.22 for Method 1 and 13.59 for Method 2. Determine the 95% confidence interval for the true difference between testing averages for students Method 2.
Answer:
43 < μ₁ - μ₂ < 49
Step-by-step explanation:
Sample 1:
Mean x₁ = 88
Sample size n₁ = 173
Sample standard deviation s₁ = 12,22
Sample 2:
Mean x₂ = 53,5
Sample size n₂ = 127
Sample standard deviation s₂ = 13,59
CI 95 % α = 5% α = 0,05 α/2 = 0,025
We need to find:
( x₁ - x₂ ) - tα/2,v *√ (s₁²/n₁ ) + (s₂²/n₂) < μ₁ - μ₂ < ( x₁ - x₂ ) + tα/2,v *√ (s₁²/n₁ ) + (s₂²/n₂)
v = degree of fredom
v = [ ( s₁²/n₁ + s₂²/n₂)² / (s₁²/n₁)² /n₁-1 + (s₂²/n₂)²/n₂-1
v = [ (0,86 + 1,45 ) / 0,0043 + 0,017
v = 2,31 / 0,0213
v = 108
Then t 0,025, 108 from t table is: We will take v = 100
t = 1,984
Now
√ (s₁²/n₁ ) + (s₂²/n₂) = √ 0,86 + 1,43
√ 2,3 = 1,51
Then: CI:
(173 - 127 ) - 1,984*1,51 < μ₁ - μ₂ < ( 173 - 127 ) + 1,984*1,51
46 - 3 < μ₁ - μ₂ < 46 + 3
43 < μ₁ - μ₂ < 49
please help me please i really need help
Answer:
Step-by-step explanation: It you start by getting rid of the 1/2x+1/2x it makes x=x/1. X/1 is x so x=x. X can be anything!
what is the simplest form of 153/8 - 11 1/5.
Answer:
[tex]7\frac{37}{40}[/tex]
Step-by-step explanation:
What is the distance between the points (-1,4) and (7,4)?
Answer:
8
Step-by-step explanation:
=(7−(−1))2+(4−4)2‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾√
=(8)2+(0)2‾‾‾‾‾‾‾‾‾‾√
=64+0‾‾‾‾‾‾√
=6‾√4
=8
How many solutions does the following equation have 74y - 8 -78y = -4y - 8
Answer:
a lot
Step-by-step explanation:
Solve the following problems:
Given: AAFD, mZF=90°
AD = 14, mZD=30°
Find: Area of AAFD
F
D
Please help!
A jar top is shaped like a circle. The circumference of the top is 20π centimeters.
Which measurement is closest to the area of the top in square centimeters?
31.4 cm²
62.8 cm²
314 cm²
1,256 cm²
Answer: The answer is 1,256 cm
Answer:
1,256 cm²
Step-by-step explanation:
HELP PLSSSSS :((((((
I need help with this question please.
Answer:
A
Step-by-step explanation:
Daniel has 6 erasers. He gives one to PJ. and he gives one to Ken.
He keeps the rest. What fraction of his erasers did he give away?
Answer:
2/6 a.k.a 1/3
Step-by-step explanation:
Who names a child P.J?
Which fact is related to 12 = 3 = 4?
I need help
Answer:
factors
Step-by-step explanation:
Roulette is a casino game that involves players betting on where a ball will land on a spinning wheel. An
American roulette wheel has 38 numbered slots - half of the slots from 1 to 36 are red and the other half are
black. Slots 0 and 00 are both green.
Suppose that a player bets $1 on the color red. If the ball lands in a red slot, the player gets their initial $1 back
plus a payout of $1. If the ball doesn't land in a red slot, they lose their $1 bet. Let X = the player's net gain
from a $1 bet on a the color red. Here is the probability distribution of X:
Win
Lose
X = net gain $1
-$1
18
P(X)
20
38
38
Calculate the mean of X.
You may round your answer to the nearest thousandth.
E(X) =
dollars
Answer: -0.053
Step-by-step explanation:
1•(18/38) + -1 •(20/18) = -0.053
• =multiply or times
Help please
What is the answer I’m struggling
Answer:
x equal 120 I did this question
A library has five copies of a certain textbook on reserve of which two copies (1 and 2) are hardcover books and the other three (3, 4, and 5) are softcover books. A student examines these books in random order, stopping only when a softcover book has been selected. One possible outcome is 5, and another is 213. (Enter your answers as a comma-separated list. Enter Ø for the empty set.)
Required:
a. List the outcomes in S
b. Let A denote the event that exactly one book must be examined. What outcomes are in A?
c. Let B be the event that book 5 is the one selected. What outcomes are in B?
d. Let C be the event that book 1 is not examined. What outcomes are in C?
Answer and Step-by-step explanation:
(a) Since the student have to stop when he gets to w softcover book, then the sample space should always stop at either 3 or 4 or 5. If the students examines the books randomly and stops at a softcover book, here are the possible ways he could carry this out,
S = {3, 4, 5, 13, 14, 15, 23, 24, 25, 123, 124, 125, 213, 214, 215}
2. Since only one book is to be examined then the student must check only one softcover book and end the examining. To do this, either he examines just 3 or 4 or 5. Therefore,
A = {3, 4, 5}
3. We need to pick the possibilities from the sample space that shows that the examining ended at book 5. Therefore,
B = {5, 15, 25, 125, 215}
4. We need to pick possibilities from the sample space that shows that book 1 was not examined. Therefore,
C = {3, 4, 5, 23, 24, 25}
a college says it admits only people with sat scores among the top 10%. how high an sat score does it take to be g
Full question:
Suppose SAT scores among students are normally distributed with a mean of 500 and a standard deviation of 100.
If a college says it admits only people with sat scores among the top 10%. how high a sat score does it take to be eligible?
Answer and explanation:
To find where SAT score of student falls in the test given mean and standard deviation of scores, we can calculate: x-500/100 where x is number of SAT score of students
A sat score in the top 10% region would have a score better than 90% of other SAT scores. Therefore 0.90 has a z score of 1.28
We use algebra to find the score to be eligible thus:
1.28=x-500/100
x-500=128
x=128+500
x=628
Therefore to be eligible, a student needs to score at least 628, and be in the top 10% of scores
Which of the following is a linear function?
0 x= 1/3x=y - 3
Oy = x^3 + 2
Oy = 6x^2
Oy = 2/3х
The linear functions are 1/3x=y-3 and y=2/3x. Therefore, options A and D are the correct answer.
What is a linear function?A linear function is a function that represents a straight line on the coordinate plane. The highest power of the variable is one.
Given are some equation, from the options, we need to identify which is a linear function.
1/3x=y-3 is the linear function in two variables.
y=x³ is the cubic function.
y=6x² is the quadratic function.
y=2/3x is the linear function in one variable.
Therefore, the linear functions are 1/3x=y-3 and y=2/3x.
To learn more about the linear functions visit:
brainly.com/question/21107621.
#SPJ7
Complete the table of values for y=3-2x
Answer:
1) y = -1
2) y = 3
3) y = 5
4) y = 9
Step-by-step explanation:
1) when x = -2
y = 2x + 3
y = 2(-2) +3
y = -1
2) when x = 0
y = 2x + 3
y = 2(0) +3
y = 3
3) when x = 1
y = 2x + 3
y = 2(1) +3
y = 5
4) when x = 3
y = 2x + 3
y = 2(3) +3
y = 9
Simplify. Express your answer using a single exponent.
(2m3)4
Answer:
16m^12
Step-by-step explanation
Please answer this ASAP only right answers A.) 5 B.) 8 C.) 14 D.) 9
Answer: The answer is 9
Step-by-step explanation: 9 is the number and thats what median means.
Answer:
D.) 9
Step-by-step explanation:
The box and whisker plot gives you the answer about the median. It's mainly just the middle line of the box.
What are the correct justifications, listed in proper order?
Double Angle Identity, Quotient Identity for Tangent, Simplify, Double Angle Identity
Double Angle Identity, Simplify, Double Angle Identity, Quotient Identity for Tangent
Double Angle Identity, Simplify, Quotient Identity for Tangent, Double Angle Identity
Double Angle Identity, Quotient Identity for Tangent, Double Angle Identity, Simplify
Answer: A
Double Angle Identity, Quotient Identity for Tangent, Simplify, Double Angle Identity
Step-by-step explanation:
Answer:
it's a
Step-by-step explanation:
I need help on this question
Solve: -3x+8+5x = -4
Answer:
X=-6
If satisfied, please mark brainliest
Step-by-step explanation:
-3x+8+5x=-4
Subtract 8 from both sides and add
2x=-12
X=-6
Step 1: Simplify both sides of the equation.
−3x+8+5x=−4
(−3x+5x)+(8)=−4(Combine Like Terms)
2x+8=−4
2x+8=−4
Step 2: Subtract 8 from both sides.
2x+8−8=−4−8
2x=−12
Step 3: Divide both sides by 2.
2x
2
=
−12
2
x=−6
If you eat 5 grapes per minute for 8 minutes, how many grapes will you eat?
Answer:
40 Grapes
Step-by-step explanation:
5x8=40
Answer:
40 grapes
Step-by-step explanation:
5 x 8
or
repeated addition, 5+5+5+5+5+5+5+5
Please help I’m so close to passing math
Answer:
See below.
Step-by-step explanation:
The unit rate is the cost per thing. You just divide the cost by the amount:
$7.38/18 ounces = $0.41/1 ounce
$15.39/27 ounces = $0.57/1 ounce
Therefore, $7.38 for 18 ounces is the better option.
SUPER EASY MATH! WILL MARK BRAINLIEST!Given the vectors in component form:
r = ⟨8, 4⟩
s = ⟨–3, –4⟩
t = ⟨–5, 1⟩
Perform the operations.
5r – 3s + 8t
What is the magnitude and direction angle of the resultant vector?
A. 10.8, θ = 56.3°
B. 18.4, θ = 119.4°
C. 41.0, θ = 77.3°
D. 97.6, θ = 24.2°
9514 1404 393
Answer:
C. 41.0, θ = 77.3°
Step-by-step explanation:
The sum is ...
5(8, 4) -3(-3, -4) +8(-5, 1) = (5·8-3(-3)+8(-5), 5·4-3(-4)+8·1)
= (40+9-40, 20+12+8) = (9, 40)
The magnitude is ...
√(9² +40²) = √1681 = 41
The angle is ...
arctan(40/9) ≈ 77.3°
The resultant magnitude and direction is 41∠77.3°.
Answer:
41.0, θ = 77.3°
This is the answer Edge 2020
Pelito
A traffic helicopter ascends 167 meters more
than 2 times its original height. This is 1027
meters above the ground. What is the original
height, h, of the helicopter?
Math:
original height
I need help I will give Brainliest
Answer:
[tex] 129° + (x + 19) ° = 180° \: (angles \: on \: a \: straight \: line) \\ x = 180° - (129° + 19°) \\ x = 32°[/tex]
