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The chi-square statistic is used to determine whether there are differences between two nominally scaled variables. Chi-Square is a statistical test used to compare two nominal variables to determine whether they differ.

The Chi-Square test is used to test for differences between two groups. When you want to compare groups or examine the relationship between two variables, this test is useful. The chi-square test is a method of statistical inference that can be used to compare observed frequencies with expected frequencies, allowing us to determine whether there is a meaningful difference between them. When the p-value obtained from a chi-square test is less than 0.05, it is generally considered statistically significant.

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Answer:

b = 14

Step-by-step explanation:

3b/7 -1 = 5

3b/7 = 6

3b = 6x7 = 42

b = 42/3

b = 14

Answer:

b = 14

Step-by-step explanation:

3b/7 - 1 = 5

Add 1 to both sides.

3b/7 = 6

Multiply both sides by 7 to cancel the fraction.

3b = 42

Divide both sides by 3 to get b by itself.

b = 14

Proof:

3b/7 - 1 = 5

Insert variable.

3(14)/7 - 1 = 5

Multiply.

42/7 - 1 = 5

Divide.

6 - 1 = 5

Subtract.

5 = 5

Answer:

bottom right graph

Step-by-step explanation:

Answer:

135 degree

Step-by-step explanation:

total sum of angle = (8-2) * 180 = 1080

each angle = 1080/8 = 135 degree

Answer:

5

Step-by-step explanation:

IQR is Q3 - Q1

The question is asking for Checkers so disregared the Chess. On the box we see 3 dots. The only in the middle is the median. The one to the right of the median is Q3, and the other one (to the left of the dot) is Q1. The, Q3 = 15 and Q1 = 10. So, 15-10 = 5. Therefore, the IQR of Checkers is 5.!!

The circumference of the cross-section that is parallel to the base and a distance of 10 mm from the vertex V of the cone is 20π mm.

We have,

To find the circumference of the cross-section parallel to the base and a distance of 10 mm from the vertex V of the cone, we can consider the similar triangles formed by the cross-section and the base.

Let's denote the radius of the cross-section as r.

We can set up the following proportion:

r / 20 = (r + 10) / 40

To solve for r, we can cross-multiply and simplify:

40r = 20(r + 10)

40r = 20r + 200

20r = 200

r = 200 / 20

r = 10

Therefore, the radius of the cross-section is 10 mm.

Now, we can calculate the circumference of the cross-section using the formula for the circumference of a circle:

C = 2πr

C = 2π(10)

C = 20π

Thus,

The circumference of the cross-section that is parallel to the base and a distance of 10 mm from the vertex V of the cone is 20π mm.

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We have evidence to suggest that the standard deviation of the number of fish in a 20-gallon tank is different from twoat the 5% level.

To determine if the standard deviation is different from two at the 5% level, we can perform a hypothesis test. The null hypothesis is that the standard deviation is two, and the alternative hypothesis is that the standard deviation is different from two.

We can use a chi-square test statistic to test this hypothesis. The test statistic is calculated as:

χ² = (n - 1) * s² / σ²

where n is the sample size, s is the sample standard deviation, and σ is the hypothesized population standard deviation.

We can then compare this test statistic to the critical value from the chi-square distribution with n - 1 degrees of freedom at the 5% significance level.

Using the given data, we have:

n = 15

s = 1.256

σ = 2

Plugging these values into the formula, we get:

χ² = (15 - 1) * 1.256² / 2² = 42.891

Using a chi-square distribution table or a calculator, we find that the critical value with 14 degrees of freedom at the 5% level is 23.685.

Since our test statistic (42.891) is greater than the critical value (23.685), we reject the null hypothesis and conclude that the standard deviation is different from two at the 5% level.

Therefore, based on the data provided, we have evidence to suggest that the standard deviation of the number of fish in a 20-gallon tank is different from two.

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The solution to the system of equations is x = -3 and y = 2. The y-value of the solution is 2

To find the y-value of the solution to the system of equations, we can solve the system using any suitable method such as substitution or elimination.

Given system of equations:

3x + 5y = 1

7x + 4y = -13

Let's use the method of elimination to solve the system:

Multiply equation 1 by 4 and equation 2 by 5 to make the coefficients of y in both equations equal:

4(3x + 5y) = 4(1) --> 12x + 20y = 4

5(7x + 4y) = 5(-13) --> 35x + 20y = -65

Now, subtract equation 1 from equation 2 to eliminate the y term:

(35x + 20y) - (12x + 20y) = -65 - 4

35x - 12x = -69

23x = -69

x = -69/23

x = -3

Substitute the value of x into equation 1 to find y:

3(-3) + 5y = 1

-9 + 5y = 1

5y = 1 + 9

5y = 10

y = 10/5

y = 2

Therefore, the solution to the system of equations is x = -3 and y = 2. The y-value of the solution is 2.

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Answer:

Your initial inequality should be 5x < 30

Step-by-step explanation:

I saw it on a answer similar to yours but it said "have at least 10$ of your money left"

Answer:

20% increase

Step-by-step explanation:

Answer: 20% increase!

Step-by-step explanation:

$60-$50= $10 Increase

10/50*100% = 20%

hope this helped, have a nice day! :)

Answer:

x = 16

Step-by-step explanation:

Let's assume that the number of players the team can bring to the tournament is represented by the variable "x."

Given that the total amount raised by the team is $1672.50, the cost of renting the bus is $1068.50, and the budgeted amount per player for meals is $37.75, we can write the equation to determine the number of players as follows:

Total amount raised - Cost of bus - (Budget per player * Number of players) = 0

1672.50 - 1068.50 - (37.75 * x) = 0

Now, let's solve the equation for x:

1672.50 - 1068.50 - 37.75x = 0

603 - 37.75x = 0

To isolate the variable x, let's subtract 603 from both sides of the equation:

-37.75x = -603

Now, divide both sides of the equation by -37.75:

x = -603 / -37.75

x = 16

Therefore, the team can bring approximately 16 players to the tournament.

Answer:

They are all true equations and since the questions isn't really provided I'm not sure how to help, but I believe the answer is A

Step-by-step explanation:

Answer:

they very much are there

Step-by-step explanation:

Answer:

37.5 degrees

Step-by-step explanation:

All triangle angles must sum up to 180 degrees

63 + 90 = 153

153 = 4x + 3

150 = 4x

37.5 = x

Answer:

B

Step-by-step explanation:

Circumference is equal to \(\pi d\)

\(C=\pi d\)

\(C=\pi \times 8\)

Answer:

there u go

Step-by-step explanation:

Answer:

81.2ft

Step-by-step explanation:

33 = h/125

Answer:

The answer is -5 + (-3).

Step-by-step explanation:

Answer:

-5 is the original position

The swimmer descends 3 meters, so we subtract 3 or add -3. Thus, the answer is:

-5 + (-3)

Step-by-step explanation:

Two interior opposite angles of a triangle are equal to the exterior angel

\(60 + 60 = 2x - 80 \\ 120 = 2x - 80 \\ 2x = 120 + 80 \\ 2x = 200 \\ x = \frac{200}{2} \\ x = 100\)

Therefore, the value of n that makes the system of equations true is n = 10.

Given:

p = 2n

p - 5 = 1.5n

Substituting the value of p from the first equation into the second equation, we have:

2n - 5 = 1.5n

Next, we can solve for n by subtracting 1.5n from both sides of the equation:

2n - 1.5n - 5 = 0.5n - 5

Simplifying further:

0.5n - 5 = 0

Adding 5 to both sides of the equation:

0.5n = 5

Dividing both sides by 0.5:

n = 10

Therefore, the value of n that makes the system of equations true is n = 10.

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An example of two nonlinear functions that don't dominate each other is the sin function (f(x) = sin(x)) and the exponential function (g(x) = e^x).

For any given value of x, the sin function oscillates between -1 and 1, taking on both positive and negative values. It has a periodic nature and does not grow or decay exponentially as x increases or decreases.

On the other hand, the exponential function grows or decays exponentially as x increases or decreases. It is characterized by a constant positive growth rate. The exponential function increases rapidly when x is positive and approaches zero as x approaches negative infinity.

The key characteristic here is that the sine function oscillates while the exponential function grows or decays exponentially.

Due to their fundamentally different natures, neither function dominates the other over their entire domains.

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Some information that someone might use to solve problems related to a circle design is the Tangent Arc theorem.

The tangent arc theorem states that if an angle is formed by two secants, one secant, one tangent, or two tangents, and also intersects in a space outside of the circle, then the value obtained will be equal to the difference of the values of the intercepted arcs divided by one and a half.

Also, note that angles outside a circle are those whose vertex or arc is pointed outwards and their sides are either secants or tangents. With this information, it will be possible to solve problems related to tangent lines and arc measures.

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Answer:

xem

Step-by-step explanation:

The total number of coins Latanya has if she has 90 nickels and 150 pennies is 240.

The total number of coins Latanya has if she has n nickels and p pennies is n + p.

Latanya finds some nickels and pennies under the couch cushions.

Latanya has 90 nickels and 150 pennies.

Therefore, the number of coins she has can be calculated as follows:

number of nickels = 90

number of pennies = 150

Therefore,

total number of coins = 150 + 90

total number of coins = 240

If she has n nickels and p pennies, the total coins can be calculated as follows:

number of nickels = n

number of pennies = p

total coins = n + p

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Answer:

Step-by-step explanation:

/D. There is not enough information to awnser this question

Answer:

Step-by-step explanation:

(70 x 10^-4) x (60 x 10^6) = (70 x (\(\frac{1}{10}\) x  \(\frac{1}{10}\) x  \(\frac{1}{10}\) x  \(\frac{1}{10}\))) x ( 60 x 1000000)

= 70 x \(\frac{1}{10000}\) x 60000000 = 420000

Answer:

(70x10^-4) x (60 x 10^6) = 420000

so the answer would be

420000

The probability that the mean daily revenue for the next 30 days will exceed $7000 is 47.60%.

The formula for the z score is-

z = (x - μ)/σ

In which,

Put the value in formula

z = (7000 - 7200)/1200

z = - 0.16

Thus,

P(x > $7000) = P(z >  - 0.16)

See the p- value for obtained z from negative z score table.

P(x > $7000) = 0.4760

Thus, the probability that the mean daily revenue for the next 30 days will exceed $7000 is 47.60%.

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Answer:

52.36%

Step-by-step explanation:

First, you need to find the radius of the circle. You can do this by using the Pythagorean theorem, which states a^2+b^2=c^2. In this case, a and b are equal to 1.2 and 1.6, and c is the radius of the circle. Plugging in we get 1.2^2+1.6^2=c^2 or 1.44+2.56=c^2 or 4=c^2. Finding the square root of both sides of the equation, we find that 2=c. Now that we have the radius, we can find the area of the circle. The area of a circle is expressed as πr^2, and plugging in 2 for r we get an area of 4π, or ~12.56637. Now all we do is divide 12,56637 by 24 and get what percentage of the area of the triangle the circle covers, which is roughly 0.5236, or 52.36%

The length of a standard basketball court is 94 feet (28.65 meters), and the width is 50 feet (15.24 meters).

A standard basketball court is rectangular in shape and follows certain dimensions specified by the International Basketball Federation (FIBA) and the National Basketball Association (NBA). The length and width of a basketball court may vary slightly depending on the governing body and the level of play, but the most commonly used dimensions are as follows:

The length of a basketball court is typically 94 feet (28.65 meters) in professional settings. This length is measured from baseline to baseline, parallel to the sidelines.

The width of a basketball court is usually 50 feet (15.24 meters). This width is measured from sideline to sideline, perpendicular to the baselines.

These dimensions provide a standardized playing area for basketball games, ensuring consistency across different courts and facilitating fair play. It's important to note that while these measurements represent the standard dimensions, there can be slight variations in court size depending on factors such as the venue, league, or specific regulations in different countries.

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Answer :  I thinks it’s 3

Answer:

3 * 7 *2

(front face and back)

plus

1 * 3 * 2

plus

7 * 1 * 2

=

42 + 6 + 14

= 72

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