Answer:
Step-by-step explanation:
Null hypothesis: [tex]\mathbf{H_o: \mu_1 \ge \mu_2}[/tex]
Alternative hypothesis: [tex]\mathbf{H_o: \mu_1< \mu_2}[/tex]
This type of test statistic is a z test statistics
1st 2nd
Sample mean x = 112.2 117,8
Standard deviation σ = 14.0 14.5
Sample size n = 95 70
Point estimate [tex]\bar x_1 - \bar x_2[/tex] = -5.60
Standard error [tex]\sigma_{x_1-x_2}= \sqrt{\dfrac{\sigma_1^2}{n_1} +\dfrac{\sigma_2^2}{n_2} }[/tex]
[tex]= \sqrt{\dfrac{14.0^2}{95} +\dfrac{14.5^2}{70} }[/tex] = 2.2509
Test statistics [tex]z=\dfrac{x_1 - x_2}{\sigma_{x_1-x_2}}[/tex] [tex]=\dfrac{112.2- 117.8}{2.2509}[/tex] = - 2.4878
P-value = 0.012
No, there is no enough evidence Since p-value is greater than 0.01.
Anyone know how to do this?
Answer:
They cannot form a triangle.
Step-by-step explanation:
A triangle can only be formed if the sum of the lengths of any 2 sides are greater than the 3rd side. 2 + 7 is less than 15, so this cannot be a triangle.
In an arithmetic sequence (Sn=n^2 -2n) .USE formula (Tn=Sn-Sn-1) to determine Tn
Answer:
Tn=-1
Step-by-step explanation:
Please mark as brainliest
The question is in the graph. Please help.
Answer:
A I think
Step-by-step explanation:
because if you add them up.
Answer:
Aprox. 216 days
Step-by-step explanation:
Add the counts of the green bar(5-10mm) and the brown bar (0-5mm).
The brown is roughly 130 and the green is roughly 80, which is approx 216 days.
If i helped, a brainliest answer would be greatly appreciated!
It cost $5.25 for a bottle of 150 vitamins. if the cost varies directly with the number of vitamins in the bottle, what should a bottle of 250 vitamins cost?
what is the equation o the situation?
Could you please give me the equation and show me how you got it please so I could understand... thanks.
Answer: $8.75 for 250 vitamins.
Step-by-step explanation:
To find how much each vitamin costs we can divide $5.25 by 150.
5.25/150 = 0.035. So each vitamin is equal to $0.035.
We can then multiply the cost of 1 vitamin by 250.
0.035 x 250 = 8.75 or $8.75.
We can also make an equation for this problem. Let the total cost be equal to y and each vitamin equal to x.
y = 0.035x
So the equation above states that the total cost, y, is the amount of vitamins that are bought.
Can you help me please it has to be harry potter and the philosopher's stone movie
Answer and Step-by-step explanation:
Divide each side by 2.
x [tex]\geq[/tex] 5
This is the correct answer for getting the x by itself.
#teamtrees #PAW (Plant And Water)
Answer:
4
Step-by-step explanation:
2x10=20
I think...
Use the quotient rule to simplify the expression. Write the expression with positive exponents.
Answer:
[tex]\displaystyle 4^{4}[/tex]
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
Exponential Rule [Dividing]: [tex]\displaystyle \frac{b^m}{b^n} = b^{m - n}[/tex]Step-by-step explanation:
Step 1: Define
[tex]\displaystyle \frac{4^{-4}}{4^{-8}}[/tex]
Step 2: Rewrite
Exponential Rule [Dividing]: [tex]\displaystyle 4^{-4 - (-8)}[/tex]Subtract Exponents: [tex]\displaystyle 4^{4}[/tex]I don’t understand this problem can someone please help !
Answer:
Step-by-step explanation:
tan 7 = 4.4/x
x = 4.4/ tan 7
x= 35.8 ft
Pleeease help for my exam. Suppose a bag contains 8 silver coins and 2 bronze coins what is the probability of randomly choosing a silver coin not replacing it and then randomly choosing another silver coin??
Answer: 28/45
Step-by-step explanation:
Find the circumference of the circle.
Answer:
25.12ft
Step-by-step explanation:
C=2πr
C = 2(3.14)(4)
C = 25.12ft
Answer:
25.12
Step-by-step explanation:
The circumference of a circle is equal to [tex]2\pi r[/tex]. So, to find the circumference plug in 4 for r and solve the expression. [tex]2\pi 4[/tex], where [tex]\pi[/tex] equals 3.14 is 25.12.
Which expression is equivalent to 4/9 divided by 2/3
A) 4/9 x 2/3
B) 4/9 x 3/2
C) 9/4 x 2/3
D) 9/4 x 3/2
What is the rectangular form of Theta = StartFraction 3 pi Over 4 EndFraction?
Answer:
C
Step-by-step explanation:
edge
Answer:
C or x+y=0
Step-by-step explanation:
edg
Identify each part in the expression below. will give brainliest
Answer:
smalls
Step-by-step explanation:
find 2 numbers if their sum is 3 and their difference is 21
Answer:
the 2 numbers are 12 and -9
Step-by-step explanation:
x + y = 3
x - y = 21 Adding:-
2x = 24
x = 12
y = 3 - x = 3 12 = -9
Answer the 2 numbers are 12 and -9
Answer:
The numbers are 12 and - 9.
Step-by-step explanation:
12 - 9 = 3
- 9 to 12 is 21
The length of a side of a cube can be determined
by Ending the cube root of its volume. If a cube has
a volume of 64 cm', what is the length of a sde?
A 4.0 cm
B. 8.0 cm
C. 160 cm
D 32.0 cm
Answer:
Side of cube = 4 cm
Step-by-step explanation:
Given:
Volume of cube = 64 cm³
Find:
Side of cube
Computation:
Volume of cube = side³
64 = side³
Side of cube = 4 cm
Can someone help me? I'll reward points and brainalist
Answer: I think it D for number 2 and b for number 3
Step-by-step explanation:
Answer:
1) B. 2) A.
Step-by-step explanation:
For number 1, put 30 into the equation. (3•30-5). When solved, your answer is 85, the same as the top. They are vertical angles which makes the two equal.
For number 2, I tried to draw the triangles on paper and the one that wasn't possible was A. The side 6 would be too long to connect to 4 or 3.
Find the missing side length of the right triangle below.
26 cm
10 cm
b
Answer:
24
Step-by-step explanation:
we'll use the pythagoras theorm, but change it a little
instead of a² + b² = c², we'll use c² - a² = b²
26² - 10² = 576
the square root of 576 is 24, and that's the answer :)
PLEASE HELP 100 points to who ever gives me the answer Compare the numbers using >, <, or =.
a) -2 3
b) |-12| |15|
c) 3 -4
d) |15| |-12|
e) 7 -11
Answer:
a) -2 < 3
b) |-12| < |15| (the absolute value of -12 is 12 so that's comparing 12 to 15)
c) 3 > -4
d) |15| > |-12|
e) 7 > -11
What is the y intercept please I need help !!!!
Answer:
answer issssssssssssssss on the fhoto
Four students were asked to write an expression which has terms that have a greatest common factor of ab. The expressions provided by the students are shown below.
Michelle
16 a + 3 b
Naomi
18 a b c minus 13 a b c
Olivia
20 a b minus 14 a b c
Peyton
15 a b c + 14 a b
Which student wrote the correct expression?
Michelle
Naomi
Olivia
Peyton
Answer:
D.) Peyton
Step-by-step explanation:
If m is any integer, then gcd(a + m⋅b, b) = gcd(a, b). If m is a positive common divisor of a and b, then gcd(a/m, b/m) = gcd(a, b)/m. The GCD is a multiplicative function in the following sense: if a1 and a2 are relatively prime, then gcd(a1⋅a2, b) = gcd(a1, b)⋅gcd(a2, b). Factoring out the GCF is the first step in many factoring problems. Step 1: Determine the greatest common factor of the given terms. The greatest common factor or GCF is the largest factor that all terms have in common. Step 2: Factor out (or divide out) the greatest common factor from each term.
Answer:
peyton is correct because she is the only one with ab even in her awnser
Step-by-step explanation:
What is 20% of 8? Write your answer to the nearest tenth.
Answer:
1.6
Step-by-step explanation:
To find 20% of 8, multiply 8 by 0.2
8(0.2)
= 1.6
So, 20% of 8 is 1.6
14.5% of 90 is n. The value of n is 15
Answer:
dddddddddddddddddddddddddd
Step-by-step explanation:
dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd
Find the value of x
Answer:
it's 60
Step-by-step explanation:
Each bracelet needs 7_2/3 inches of string. If Samantha is making 4 bracelets, how many inches of string does she need?
Answer:
30.667 inches of string
Step-by-step explanation:
On the Celsius scale, what does O represent?
a. the theoretical coldest possible temperature
b. an arbitrary number based on its inventor's freezer
c. the freezing point of water
d. the natural temperature of brine
Answer:
The answer is C.
Step-by-step explanation:
I just took the test on edg.
Answer:
c. freezing point of water
Step-by-step explanation:
did on edge 2021
a car has a tire radius of 36 cm. a stone gets stuck how many times will it hit the ground when the car travels a distance of 1 kilometer. PLS show your work
Answer:
2777 times
Step-by-step explanation:
You can choose to convert however you like, as long as you divide when they have the same units.
1km = 1000m = 100000cm
36cm = 0.36m = 0.00036
Hence, 1000m÷0.36m = 2777.77777...
Round down to 2777
The stone will hit the ground approximately 442 times when the car travels a distance of 1 kilometer.
What is speed?Speed is the measure of how quickly an object travels a certain distance. It is defined as the distance traveled by an object divided by the time taken to travel that distance.
The unit of speed is typically meters per second (m/s) or kilometers per hour (km/h), although other units may also be used depending on the context.
Assuming that the stone is stuck at the bottom of the tire and remains there, the stone will hit the ground every time the tire makes a complete rotation. The circumference of the tire is given by:
C = 2πr
where r is the radius of the tire. Substituting the given value of r = 36 cm, we get:
C = 2π(36) cm ≈ 226.19 cm
Therefore, the tire travels a distance of approximately 226.19 cm with each complete rotation. To find out how many times the stone will hit the ground when the car travels 1 kilometer, we need to convert 1 kilometer to centimeters:
1 kilometer = 1000 meters = 1000 x 100 centimeters = 100000 cm
Dividing the distance traveled by the circumference of the tire, we get:
100000 cm ÷ 226.19 cm/rotation ≈ 442.28 rotations
Therefore, the stone will hit the ground approximately 442 times when the car travels a distance of 1 kilometer.
To know more about speed follow
https://brainly.com/question/30965512
#SPJ2
A mechanic estimates that a tire still has
Can someone please help me I need this for a test thank you so much whoever answers this.
8,000 miles of useful tread life. This is 20% of
the original useful tread life of the tire. What
was the tire's original useful tread life?
A) 50,000
B) 40,000
C) 1,600
D) 30,000
Answer:
B
Step-by-step explanation:
100% is unknown 100:20 is 5
8,000*5=40,00
Tammy must run more than 67 miles total to reach her fitness goals. She has already run 35 miles and runs 4 miles per day, Which
of the following inequalities could be used to solve for x, the number of days Tammy still needs to run to reach her fitness goals?
Answer:
[tex]35 + 4x > 67[/tex]
To reach her fitness goal, she needs to run for more than 8 days.
Step-by-step explanation:
She has already run 35 miles and runs 4 miles per day:
This means that after x days, the distance she will have run is:
[tex]D(x) = 35 + 4x[/tex]
Tammy must run more than 67 miles total to reach her fitness goals.
This means that:
[tex]D(x) > 67[/tex]
[tex]35 + 4x > 67[/tex]
The inequality is:
[tex]35 + 4x > 67[/tex]
Solution:
[tex]4x > 32[/tex]
[tex]x > \frac{32}{4}[/tex]
[tex]x > 8[/tex]
To reach her fitness goal, she needs to run for more than 8 days.
The three angles of a triangle are in the ratio 1:2:1.
a) Find all the angles of the triangle.
b) Classify the triangle in two different ways
I think the answer is nine but I’m not sure how to explain how I got my answer
Answer:
ur answer is right it is 9
Step-by-step explanation:
NOTE: divide the number 36 with 4 and u will get 9
GOOD JOB
Please mark as brainliest
Have a great day, be safe and healthy
Thank u
XD
An article summarized data from a survey of a random sample of a certain number of U.S. adults with investments of $10,000 or more. Based on the survey data, it was estimated that 38.5% of investors manage their investments by doing everything they possibly can online. But the authors of the article also noted that there was quite a difference between younger investors (ages 18 to 49) and older investors (ages 50 and older). For younger investors, 63% said they do everything they possibly can online, while the percentage for older investors was 28%.
A) Use the given information to estimate P(O), POLY), and P(OF) where 0 = event that a randomly selected Investor does everything possible online, Y = event that a randomly selected Investor is age 18 to 49, and F = event that a randomly selected investor is 50 years old or older.
B) Suppose that 40% of investors are between the ages of 18 and 49. Use the probabilities from part (a) and the estimate P(Y) = 0.40 to construct a hypothetical 1,000 table.
Y F Total
0
Not 0
Total 1,000
Use information in the table to calculate P(YO).
Which of the following sentences properly interprets this value in the context of this exercise?
A. The probability, given that a randomly selected investor is age 50 or older, that the investor does everything possible online is PLYO).
B. The probability, given that a randomly selected investor is age 18 to 49, that the investor does everything possible online is P(710).
C. The probability, given that a randomly selected investor does everything possible online, that the investor is age 50 or older is P(YO).
D. The probability, given that a randomly selected investor does everything possible online, that the investor is age 18 to 49 is Ayo).
E. The probability that the selected investor is age 18 to 49 is P(YO).
Answer:
Based On The Survey Data, It Was Estimated That 36% Of Investors Manage Their Investments By Doing Everything They Possibly Can Online. But The Authors Of The Article Also Noted That There Was A Quite A Difference Between . ... random sample of a certain number of U.S. adults with investments of $10,000 or more.
Step-by-step explanation:
Please make me brainiest