eighteen obese volunteers weighed themselves before and after a two-day fast. the appropriate design for testing the significance of the difference between the means is
A. Independent sample T test
B. Dependent sample T test
C. One sample T test D. Z test

Answer:

100cm

Step-by-step explanation:

The relationship between the ratio and the heights is 20. i.e 4 : 5 = 80 : 100

Hope this helps, please tag brainliest.

The height of the taller boy is 100cm.

Ratio, is a term that is used to compare two or more numbers. It is used to indicate how big or small a quantity is when compared to another. In a ratio, two quantities are compared using division.

Let the height of the taller boy be x cm and smaller boy be y cm.

According to the given question.

The ratio of height of the two boys is 4:5.

Since, it is obvious that 4:5 is the ratio of the height of smaller boy to the taller boy. Because k will be the ratio of proportionality then 4k will given the smaller value and 5k will give the larger value therefore, 4:5 represents the ratio of height of smaller boy to the taller boy.

\(\implies \frac{y}{x} =\frac{4}{5}\)

Also, the height of the shorter boy is 80cm.

Therefore,

\(\frac{80}{x} = \frac{4}{5}\)

\(\implies 80\times 5 = 4\times x\)

\(\implies 400 = 4\times x\)

\(\implies x = \frac{400}{4}\)

\(\implies x = 100cm\)

Hence, the height of the taller boy is 100cm.

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Nul(A) = Nul(B) , Col(A) = Col(B) in integer matrices.

Describe matrix using an example?

A matrix is a collection of numbers that have been put in rows and columns to make a rectangular array. The entries of the matrix are the numbers, which are referred to as its elements.

                                 In addition to many other areas of mathematics, matrices have extensive applications in the fields of engineering, physics, economics, and statistics.

The null space of any matrix A consists of all the vectors

 X  such that Ax = 0

And the column space of a matrix A is the span of its column vectors.

Let  A = \(\left[\begin{array}{ccc}1&0&0 \\0&1&0\\0&0&1\end{array}\right]\)

Therefore, Nul(A) = {(0,0,0,w ) w∈ Z }

 Col(A) = span{ (1,0,0), (0,1,0) , (0,0,1) }

By using definition of Null space of matrix and column space of matrix.

 Let B = \(\left[\begin{array}{ccc}1&1&0\\0&1&0\\0&0&1\end{array}\right]\)        

Nul(A) = {(0,0,0,w ) w∈ Z }

 Col(A) = span{ (1,0,0), (0,1,0) , (0,0,1) }

Hence Nul(A) = Nul(B) , Col(A) = Col(B)

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Answer:

6 levels

Step-by-step explanation:

60 - 5 (to set up the character)

55 total minutes

8(l) = 55

L = 55/8

L = 6.875

.˙. they can finish 6 levels

Answer:

A.  50

Step-by-step explanation:

a + b = 90

b = 90-50 = 40

b + c = 90

c = 90-40 = 50

Answer: Increase

Step-by-step explanation: 18 is greater than 12

Answer:

D.

8 cm3

Step-by-step explanation:

V=BH/3

V=(4)(6)/3

V=(24)/3

V=8

Answer:

8cm is the answer

for gradpoint it's 8cm^3

Step-by-step explanation:

V=4•63=8 V equals the quantity 4 multiplied by 6 end of quantity divided by 3 equals 8.

The wind speed for category 1 is from 74 to 95 mph.

The wind speed for category 3 is from 111 to 129 mph.

Wind speed is the speed at which air moves horizontally on the Earth's surface it is measured in miles per hour (mph), kilometers per hour (km/h), or meters per second (m/s).

We have,

The Saffir-Simpson Hurricane Wind Scale is a 5-point scale that categorizes hurricanes based on their wind speeds.

i.e

Category 1 - Winds 74-95 mph (64-82 kt)

Category 2 - Winds 96-110 mph (83-95 kt)

Category 3-  Winds 111-129 mph (96-112 kt)

From the categories above.

The wind speed is needed for a storm to become a Category 1 hurricane.

= 74 mph to 95 kph

The wind speed is needed for a storm to become a Category 3 hurricane.

= 96 mph to129 mph

Thus,

For category 1, the wind speed is from 74 to 95 mph.

For category 3, the wind speed is from 111 to 129 mph.

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Answer: 7.2

Step-by-step explanation:

\(\tan 29^{\circ}=\frac{4}{CD}\\CD \tan 29^{\circ}=4\\CD=\frac{4}{\tan 29^{\circ}} \approx {7.2}\)

Answer:

area of a circle = πr^2

So to find the area we need to know the radius. This is easy, as the radius is half of the diameter. So let's half it:

34/2 = 17m

And then substitue 17, for r:

= π(17)^2

= 289π

= 907.9202769m^2

You can round this however you like, but the best options are often either 3 significant figures, either 1 or 2 decimal places.

Answer:

\(y=-x+2\)

Step-by-step explanation:

\(2x+2y=4\)

\(2y=-2x+4\) (Subtract 2x from both sides of the equation)

\(y=\frac{-2x+4}{2}\) (Divide both sides of the equation by 2 to get rid of y's coefficient)

\(y=-x+2\) (Simplify RHS)

Hope this helps!

Answer:

x=3

Step-by-step explanation:

1/4x=1/2+1/4

1/4x=3/4

4*1/4x=3/4*4

x=3

The inequality of the scenario is 8.50n + 9 ≤ 43

From the question, we have the following parameters that can be used in our computation:

Amount = $43

The cost of n books and 4 pens can be expressed as:

8.50n + 2.25(4)

We can simplify this expression:

8.50n + 9

We know the student has a total of $43 to spend, so we can set up an inequality:

8.50n + 9 ≤ 43

Subtracting 9 from both sides, we get:

8.50n ≤ 34

Dividing both sides by 8.50, we get:

n ≤ 4

Hence, the inequality that best represents the scenario is: n ≤ 4 or 8.50n + 9 ≤ 43

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Complete question

For this item, select the answers from the drop-down menus A student has $43 in total to buy books that cost \$8.50 each and pens that cost $2.25 each. The student buys n number of books and 4 pens

Complete the inequality to best represent the scenario.

Answer:

the answer should be x=2

Step-by-step explanation:

EDITTT!!!

x+3=5

x+3-3=5-3

x=5-3

x=2

Being 90% confident in a problem means that there is a 90% chance that the confidence interval calculated from a sample contains the true population mean.

In other words, if we take 100 different samples of the same size from the population and calculate a confidence interval for each sample, then we can expect that 90 of those intervals will contain the true population mean.

This is the definition of a confidence level. Therefore, we can say that there is a 90% chance that the confidence interval we have calculated includes the true population mean.

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Answer:

A

Step-by-step explanation:

The reflection line remained and you can see that the direction changed of the shape and the vertex pointing down on the right is pointing up on the left

A swimming pool shaped like a rectangular prism has a volume of 124 cubic meters.

Rectangular prism is a three-dimensional shape that has 6 rectangle faces, 12 edges and 8 vertices.

Volume is defined as the amount of space that a three-dimensional shape occupies.

The volume of a rectangular prism can be calculated using the formula below.

V = l x w x h

where V = volume

l = length

w = width

h = height or depth

Plug in the values to the formula, multiply by the conversion factor, and solve for the volume.

V = l x w x h

V = (26 feet)(14 feet)(12 feet)(0.305 meter/foot)³

V = 124 cubic meters

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Answer:

a) n less than or equal to 21

b) n greater than or equal to 5

c) n > 3/5

Step-by-step explanation:

i hope this helps!!

Answer:

A.) n ≤ 21

B.) n  ≥ 5

C.) n > 3/5

Step-by-step explanation:

For the first question it says that the number is no more than 21, so it could be equal to or less than 21

For the second question, it says that the number is at least 5, so it could be equal to or greater than 5

Finally, for the last question it says that the number is more than 3/5, so greater than would be the correct inequality symbol to use

Answer:

We need the scenario.

Step-by-step explanation:

Generally the independent variable is the thing you are changing and the dependent variable is being changed based on the independent variable.

Ex:

y= x+1

x is the independent variable because you can put in whatever value you want in and y is the dependent variable because its value depends on what you choose for x if that makes sense. I would need you scenario to be able to tell you exactly what it is.

Answer:

For the first one test score

For the second  one it's y-axis

Step-by-step explanation:

I just did the assignment

Answer:

C. g(f(x)) = \((x - 5)^{2}\)

Step-by-step explanation:

f(x) = x - 5

g(x) = \(x^{2}\)

g(f(x)) = \((x - 5)^{2}\)

Using it's definition, the probabilities are given as follows:

The probability of an event in an experiment is calculated as the number of desired outcomes in the context of the experiment divided by the number of total outcomes in the context of the experiment.

The total number of bulbs in this problem is given as follows:

6 + 9 + 5 = 20.

Six of them are red, hence the probability of a red bulb is:

p = 6/20 = 0.3 = 30%.

Nine of them are blue, hence the probability of a blue bulb is:

p = 9/20 = 0.45 = 45%.

Five of them are green, hence the probability of a green bulb is:

p = 5/20 = 0.25 = 25%.

The probability of a red or blue bulb is:

p = 0.3 + 0.45 = 0.75.

The probability of a blue or green bulb is:

p = 0.45 + 0.25 = 0.6.

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False. A data set may have one mode, but it is also possible for a data set to have no mode or multiple modes.

A mode of data is defined as an observation with the highest frequency among the values that appear most frequently in the given data.

If no value is repeated, the dataset has no mode. If two or more values appear with the same maximum frequency, then the dataset has multiple modes.

For example, consider the following dataset:

1, 2, 3, 3, 4, 4, 5

In this dataset, both 3 and 4 appear twice, which means that the dataset has multiple modes.

So, in general, it is not always true that a data set will have exactly one mode. It depends on the values in the dataset and their frequencies.

Therefore, the correct answer would be option (B) False.

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Answer:

Hey there!

Angles in a triangle add to 180 degrees, so we have 37+104+x=180.

Simplifying, we get 141+x=180

Subtracting 141, we get x=39.

Hope this helps :)

Answer:

0

Step-by-step explanation:

Answer:

x = 1

Step-by-step explanation:

1 + 1/0 = x

-1  

1/0 = x

x0

1 = x

Backwards PEMDAS where each thing you do backwards cancles itself out.

The probability of the student's name being drawn first is 1/3.

The probability that you and your two friends will be chosen, but your name will be drawn first is 1/3.The likelihood or chance of a specific event happening is referred to as probability. The probability of an event is represented by a number between 0 and 1, with 0 indicating that the event will never occur, and 1 indicating that the event will always occur.

Probability formula the probability of an event occurring is calculated by dividing the number of favorable outcomes by the total number of possible outcomes. Probability (P) = number of favorable outcomes/total number of possible outcomes.Probability of the scenario The total number of people who can be picked is three, with one of them being the student.

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Answer: B. 23.9 cm³

Step-by-step explanation:

V = AH

A (area of the triangle base): 6×3÷2=9cm²

H (height of the prism): 2.65 cm

------------------------

V =  AH

V =(9) (2.65)

V = (23.85)

V= 23.85cm²

 ≈23.9

Answer:

Step-by-step explanation: