Investigators performed a randomized experiment in which 411 juvenile delinquents were randomly assigned to either multisystemic therapy (MST) or just probation (control group). Of the 215 assigned to therapy, 87 had criminal convictions within 12 months. Of the 196 in the control group, 74 had criminal convictions within 12 months. Determine whether the therapy caused significantly fewer arrests at a 0.05 significance level. Start by comparing the sample percentages. Find and compare the sample percentages that were arrested for these two groups. The percentage of arrests for people who received MST was %.

Answer:

x = -6.4 and y = -3.6

Step-by-step explanation:

The given system of equations are :

[tex]y=\dfrac{3}{2}x+6[/tex] ....(1)

and

[tex]y=\dfrac{x}{4}-2[/tex] ....(2)

We need to solve equation (1) and (2).

From equation (1) and (2),

[tex]\dfrac{3}{2}x+6=\dfrac{x}{4}-2[/tex]

Taking like terms together,

[tex]\dfrac{3}{2}x-\dfrac{x}{4}=-2-6\\\\\dfrac{6x-x}{4}=-8\\\\x=-6.4[/tex]

Put the value of x in equation (1).

[tex]y=\dfrac{3}{2}(-6.4)+6\\\\=-3.6[/tex]

So, the values of x and y are x = -6.4 and y = -3.6

Answer:

x = - 2

Step-by-step explanation:

The axis of symmetry passes through the vertex, is a vertical line with equation equal to the x- coordinate of the vertex, that is

equation of axis of symmetry is x = 1

The zeros are equidistant from the axis of symmetry, on either side

x = 4 is a zero and is 3 units to the right of x = 1, so

3 units to the left of x = 1 is 1 - 3 = - 2

The other zero is therefore x = - 2

Answer:

-5x-16

Step-by-step explanation:

Combine like terms

Step-by-step explanation:

If you want to multiply a parenthesis by a number, you simply distribute the number to all the terms in the parenthesis.

So, if you want to multiply the parenthesis

(3x−7) by 5, you need to multiply by 5

both 3x and −7.

We have that 5⋅(3x)=5⋅(3⋅x)=(5⋅3)⋅x=15x and −7⋅5=−35

So, 5(3x−7)=15x−35

The sum of - -5, 3, -269, -243, 1, -3 and +9 is -507.

Integers are all whole numbers, either positive, negative or zero. In other words, integers are numbers that don’t have any fractional part. Integers can be represented as follows: {...-3, -2, -1, 0, 1, 2, 3...}

To add integers: Keep the sign of the number that is farthest from zero.

Perform the indicated operation for the rest of the numbers.

Addition of integers is easy.

When adding two integers with different signs, subtract the smaller absolute value from the larger absolute value.

The sign of the answer is the same as the sign of the integer with the larger absolute value.

To learn more about integers

https://brainly.com/question/929808

#SPJ11

Answer:

B

Step-by-step explanation:

bdeehvdvjwjkwkwwjehheeh

If you dont know the anwser its always B

Answer:

a=7

Step-by-step explanation:

4(2a-3) = 2(3a+1)

8a-12 = 6a+2

2a-12=2

2a=14

a=7

Answer:

B. $27,000

Step-by-step explanation:

So 55,000 = 2x + 1,000

Simply for x

55,000 = 2x + 1,000

54,000 = 2x

x = 27,000

Answer:

11/20

Step-by-step explanation:

55% = 55/100

55/100 = 11/20

The null hypothesis (H0): μ = 4 and alternative hypothesis (Ha): μ ≠ 4. The correct option is C.

The null hypothesis states that the mean age at which American children first read is equal to 4 years. The alternative hypothesis states that the mean age is not equal to 4 years.

In this case, the researcher is interested in whether the mean age has changed from 4 years. Therefore, the alternative hypothesis is two-tailed, meaning that the mean age could be either greater than or less than 4 years.

The null hypothesis is always tested against the alternative hypothesis. If the null hypothesis is rejected, then the researcher can conclude that there is evidence to support the alternative hypothesis. In this case, if the null hypothesis is rejected, then the researcher can conclude that the mean age at which American children first read has changed from 4 years.(Option-c)

For such more questions on null hypothesis

https://brainly.com/question/4436370

#SPJ8

The expected characteristic path length (average distance) of a random network with 104 nodes and an average degree (k) of 10 is approximately 2.

The characteristic path length of a network measures the average distance between any two nodes in the network. For a random network, the expected characteristic path length can be approximated using the formula:

L ≈ ln(N) / ln(k),

where N is the number of nodes and k is the average degree.

Substituting N = 104 and k = 10 into the formula, we have:

L ≈ ln(104) / ln(10) ≈ 2.040

Rounding to the nearest integer, we get L ≈ 2.

Therefore, the expected characteristic path length of the network is approximately 2.

To know more about path length , refer here:

https://brainly.com/question/28341287#

#SPJ11

Answer:

18

Step-by-step explanation:

It is 18. Just simply count the dots and sum them all up together, and you get 18. Unless there is a specific thing needed.

The account was open for 3 years. This duration was determined by calculating the time using the formula for simple interest based on the initial principal, interest rate, and the amount of interest earned.

To determine the length of time the account was open, we can use the formula for simple interest:

Interest = Principal * Rate * Time

Given that Tom opened the account with $600, the annual interest rate was 2%, and he received $36 in interest, we can set up the equation:

36 = 600 * 0.02 * Time

Simplifying the equation:

36 = 12 * Time

Dividing both sides by 12:

Time = 3

Therefore, the account was open for 3 years.

In conclusion, Tom's savings account was open for 3 years, as calculated using the simple interest formula.

To learn more about Simple interest, visit:

https://brainly.com/question/1173061

#SPJ11

Answer:

3

Step-by-step explanation:

I hope this answer has helped you

The value of expression x - 9, if x = 12 is 3, so the correct option is 4.

A mathematical expression is made up of a statement, at least one arithmetic operation, and at least two integers or variables.

Given:

x - 9 and x = 12

Put the value of x in the expression as shown below,

x - 9 = 12 - 9

x - 9 = 3

To know more about the expression:

https://brainly.com/question/13947055

#SPJ2

The number of degrees of freedom for treatment are 4.

Degrees of freedom is a statistical term that refers to the number of values in a calculation that are free to vary. It is a common concept in statistical inference. In general, degrees of freedom represent the number of observations in a statistical analysis that are free to vary.To find the degrees of freedom for treatment, the formula is (k - 1), where k is the number of treatment groups. In this case, there were 5 treatment groups, so the degrees of freedom for treatment would be (5 - 1) = 4.

Know more about degrees of freedom here:

https://brainly.com/question/32093315

#SPJ11

Trigonometric functions are the ratio of different sides of a triangle. The ratios sin∠m, cos∠m, and Tan∠m are 0.758, 0.6522, and 1.1624.

The trigonometric function gives the ratio of different sides of a right-angle triangle.

[tex]\rm Sin \theta=\dfrac{Perpendicular}{Hypotenuse}\\\\\\Cos \theta=\dfrac{Base}{Hypotenuse}\\\\\\Tan \theta=\dfrac{Perpendicular}{Base}[/tex]

where perpendicular is the side of the triangle which is opposite to the angle, and the hypotenuse is the longest side of the triangle which is opposite to the 90° angle.

As it is given that the base of the triangle for the ∠m is Mk(15 units), the perpendicular is KL(4√19), and the hypotenuse is 23. Now, the trigonometric ratios can be written as,

Sine

[tex]\rm Sin \theta=\dfrac{Perpendicular}{Hypotenuse}\\\\\\\rm Sin (\angle m)=\dfrac{KL}{ML}\\\\\\\rm Sin (\angle m)=\dfrac{4\sqrt{19}}{23}\\\\\\\rm Sin (\angle m)=0.758069\approx 0.758[/tex]

Cosine

[tex]\rm Cos\theta=\dfrac{Base}{Hypotenuse}\\\\\\\rm Cos(\angle m)=\dfrac{MK}{ML}\\\\\\\rm Cos(\angle m)=\dfrac{15}{23}\\\\\\\rm Cos (\angle m)=0.65217\approx 0.6522[/tex]

Tangent

[tex]\rm Tan\theta=\dfrac{Perpendicular}{Base}\\\\\\\rm Tan(\angle m)=\dfrac{KL}{MK}\\\\\\\rm Tan(\angle m)=\dfrac{4\sqrt{19}}{15}\\\\\\\rm Tan(\angle m)=1.16237\approx 1.1624[/tex]

Hence, the ratios sin m, cos m, and tan m are 0.758, 0.6522, and 1.1624.

Learn more about Trigonometric functions:

https://brainly.com/question/6904750

Answer:

3

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

9×[tex]\frac{1}{3}[/tex]

9×1/1×3=

[tex]\frac{9}{3}[/tex]÷3=

3!!!!

a. Calculation of Coefficient of Variation for each data set

Data set 1: 16 24 17 22$${\rm Mean }\ \overline{x} = \frac{16 + 24 + 17 + 22}{4} = 19.75$$

Variance σ² $= \frac{1}{N} \sum_{i=1}^{N}(x_i - \overline{x})^2$ $= \frac{(16-19.75)^2 + (24-19.75)^2 + (17-19.75)^2 + (22-19.75)^2}{4}$ $= 16.1875$

Standard deviation $σ = \sqrt{16.1875} = 4.0218$ Coefficient of variation, $CV = \frac{σ}{\overline{x}}$ $= \frac{4.0218}{19.75} = 0.2031$Therefore, the coefficient of variation for data set 1 is 20.31%.Data set 2: 2 7 1 8 200 5${\rm Mean}\ \overline{x} = \frac{2 + 7 + 1 + 8 + 200 + 5}{6} = 36.833$Variance σ² $= \frac{1}{N} \sum_{i=1}^{N}(x_i - \overline{x})^2$ $= \frac{(2-36.833)^2 + (7-36.833)^2 + (1-36.833)^2 + (8-36.833)^2 + (200-36.833)^2 + (5-36.833)^2}{6}$ $= 10627.0246$ Standard deviation $σ = \sqrt{10627.0246} = 103.0792$

Coefficient of variation, $CV = \frac{σ}{\overline{x}}$ $= \frac{103.0792}{36.833} = 2.7971$

Therefore, the coefficient of variation for data set 2 is 279.71%.

b. Identifying the data set with less consistency (or more variability) To determine which data set has less consistency (or more variability), we need to compare their coefficients of variation. A higher coefficient of variation implies higher variability or inconsistency in the data. Therefore, the correct answer is option C: Data set 2 has less consistency (or more variability) because its coefficient of variation is greater.

To know more about Standard deviation refer to:

https://brainly.com/question/475676

#SPJ11

Answer:

Its cost about 1.5625

if you rounded its 1.56 :)

Step-by-step explanation:

1.An orthonormal basis for W is False.

2.If x is not in a subspace W, projw(x) is not zero then x True.

3.The QR factorization columns of Q form an orthonormal basis for the column space of A True.

An orthogonal set in a vector space necessarily mean that it is orthonormal are the vectors orthogonal to each other, but they unit length if {V1, V2, V3} is an orthogonal set in W, that the vectors are mutually orthogonal, but they may not have unit length {V1, V2, V3} assumed to be an orthonormal basis for W.

The projection of a vector x onto a subspace W, denoted as projW(x), is defined as the closest vector in W to x. If x is not in W, then the projection of x onto W will not be zero a nonzero vector in the subspace W that is closest to x.

In a QR factorization of a matrix A, where A has linearly independent columns, the matrix Q consists of orthonormal columns. The columns of Q form an orthonormal basis for the column space of A.

To know more about  factorization here

https://brainly.com/question/31931315

#SPJ4

Answer:

38.5

Step-by-step explanation:

The maximum period of the LFSR with the given characteristic polynomial is 63.

To draw the diagram of a Linear Feedback Shift Register (LFSR) with a characteristic polynomial of [tex]x^6 + x^5 + x^3 + x^2 + 1,[/tex] we need to represent the shift register stages and the feedback connections.

The characteristic polynomial tells us the feedback taps in the LFSR. In this case, the feedback taps are at positions 6, 5, 3, 2, and 0 (the coefficients of the polynomial with non-zero exponents).

In the diagram, D1 represents the output of the first stage (bit), D2 represents the output of the second stage, and so on. The arrows represent the shift direction, with the feedback connections shown by the lines connecting the output of specific stages to the feedback taps.

Now, let's determine the maximum period of the LFSR with this characteristic polynomial. The maximum period of an LFSR is given by [tex]2^N - 1,[/tex] where N is the number of stages in the shift register.

In this case, there are 6 stages, so the maximum period is [tex]2^6 - 1 = 63.[/tex]

Therefore, the maximum period of the LFSR with the given characteristic polynomial is 63.

Learn more about polynomial here

brainly.com/question/28805616

#SPJ4

Answer: 1/12

Step-by-step explanation:

Answer:

I believe she would have to spend 2 days on vacation.

Step-by-step explanation:

She already have 7 pictures and she takes 1 a day. Therefore, she would have to spend 2 days on vacation to get 9 pictures.

Answer:

80

Step-by-step explanation:

the answer is 80 because 8×10=80

Answer:

116

Step-by-step explanation:

Area of whole thing is 196 and area of grass is 80 so you do 196-80 to get 116.

Answer:

y=5000(1.04)^t

Step-by-step explanation:

Given data

Cost of painting=$5000

Rate of increase=4%

the exponential increase expression is

y=P(1+r)^t

      Where y= the total amount after growth

                  P= the initial cost of the painting

                  r= the rate of increase

                  t= the time interval

y=5000(1+0.04)^t

y=5000(1.04)^t

The 95% confidence interval for the mean sodium content of the "reduced sodium" hot dogs is calculated to be (297.70 mg, 322.30 mg).

To find the 95% confidence interval, we use the formula:
Confidence Interval = (sample mean) ± (critical value) * (standard deviation / √sample size)
Given that the sample mean sodium content is 310 mg, the standard deviation is 36 mg, and the sample size is 40, we need to determine the critical value for a 95% confidence level.The critical value corresponds to the level of confidence and the degrees of freedom, which is the sample size minus 1. Looking up the critical value for a 95% confidence level and 39 degrees of freedom in the t-distribution table, we find it to be approximately 2.024.
Plugging in the values into the formula, we get:
Confidence Interval = 310 mg ± (2.024) * (36 mg / √40)
Simplifying the expression, we find:
Confidence Interval ≈ (297.70 mg, 322.30 mg)Therefore, we can say with 95% confidence that the mean sodium content of this brand of "reduced sodium" hot dogs falls within the range of 297.70 mg to 322.30 mg.

Learn more about mean here

https://brainly.com/question/31101410



#SPJ11