As a first step in developing a new drug to treat cancer in humans, an initial study of the drug is undertaken in rats. Three hundred rats with cancer are studied, and each is assigned to one of three treatments. One hundred rats are randomly assigned to a high dose of the new drug, 100 are randomly assigned to a low dose, and 100 are randomly assigned to a control group (no drug). After six months, each rat is examined and classified as having developed no tumors, one tumor, or two or more tumors.Which of the following would be an appropriate alternative hypothesis in this study for a chi-square test for homogeneity of tumor response across treatments?A. Ha :Ha : There is no difference in the distribution of tumor status across the three treatments.B. Ha :Ha : There is a difference in the distribution of tumor status across the three treatments.C. Ha :Ha : There is no association between tumor status and treatment.D. Ha :Ha : There is an association between tumor status and treatment.E. Ha :Ha : The proportion of rats with no tumors is the same for each treatment group.

Answers

Answer 1

Solution :

Here, we are interested to study if the treatments have any effect on going tumor or not. Actually, this is model is an ANOVA one way layout with a treatment 'drug'.

In this kind of model or ANOVA model, we take the negative statement as our null hypothesis i.e.,

[tex]$H_0:$[/tex] There is no difference in the distribution of tumors states across the three  statements.

Therefore, alternative hypothesis would be :

[tex]$H_a:$[/tex] There is a difference in the distribution of tumor states across the three treatments.

So the correct option is (B).


Related Questions

increase £196 by 9%


old old working out need asap​

Answers

215.6 euro is the answer to your question

Answer:

£213.64

Step-by-step explanation:

You do 196(0.09)

That's 17.64

The you add the two

196+17.64

The way I got 9 was from 9%.

To make it in decimal form you have to move the decimal over two places.

Hope this helps

Michael has $12.50 to buy school supplies. He spends $3.49 at one store for a package of glue sticks, but he still needs to buy for pens and a notebook. At the next store, he finds pens for $1.49 each. What is the most he can spend on a notebook if he buys the 3 pens? PLEASE HELP!

Answers

Answer: $ 4.54

Step-by-step explanation:

Enter the fraction as a decimal and a percent 3/5

Answers

0.6 I think that’s what you’re asking

Answer:

3/5 is 0.6 as a decimal and 60% as a percent.

Step-by-step explanation:

To fine the answer as a decimal, we just divide 3/5 and we get 0.6.  To find 3/5 as a percent, we will take 0.6 and multiply it by 100, which is 60%.

Scale factor 3/4 Coordinates A(1,12) B(1,6) C (0,9) Triangle DEF is a dilation of triangle ABC What's the coordinates of triangle DEF?

Answers

Answer:

The answer is below

Step-by-step explanation:

Transformation is the movement of a point from its initial location to a new location. Types of transformation is rotation, reflection, translation and dilation.

Dilation is the increase or decrease in the size of a figure by a factor (k). If k > 1, then it is a enlargement and if k < 1, it is a reduction. If a point A(x, y) is dilated by a factor k, the new point is A'(kx, ky).

Triangle DEF is a dilation of triangle ABC by a factor of 3/4. Hence the coordinates of triangle DEF is:

D(3/4, 9), E(3/4, 9/2), F(3/4, 27/4)

Determine an equation for the pictured graph. Write your answer in factored form.
Remember to start with f(x) = a (x – ri)(x - 52)...
8
7
2
y =

Answers

The anwr to this is 23

An equation for the pictured graph and the equation for the pictured graph in factored form is: y = rs - r - s + 1.

Let's assume the equation for the graph in factored form is: y = a(x - r)(x - s), where 'a' is a constant and 'r' and 's' are the roots of the equation (x-intercepts of the graph). Since we are given that the graph passes through the points (0, -2) and (1, 0), we can use this information to find the values of 'r' and 's.'

Using the point (0, -2):

When x = 0, y = -2.

We can substitute these values into the equation:

-2 = a(0 - r)(0 - s)

Simplifying, we get: -2 = a(-r)(-s) or -2 = ars.

Using the point (1, 0):

When x = 1, y = 0.

Substituting these values into the equation:

0 = a(1 - r)(1 - s)

Simplifying, we get: 0 = a(1 - r)(1 - s).

Now, we have two equations:

-2 = ars (Equation 1)

0 = a(1 - r)(1 - s) (Equation 2)

From Equation 1, we can solve for 'a' in terms of r and s:

a = -2 / rs.

Now, substitute this value of 'a' into Equation 2:

0 = (-2 / rs)(1 - r)(1 - s).

To make further progress, we can divide both sides by -2:

0 = (1 / rs)(1 - r)(1 - s).

Next, to eliminate the fractions, multiply both sides by rs:

0 = (1 - r)(1 - s).

Finally, expand the right side of the equation:

0 = 1 - s - r + rs.

The equation for the pictured graph in factored form is:

y = rs - r - s + 1.

To know more about graph here

https://brainly.com/question/17267403

#SPJ2

Please explain why the correct answer is correct :)

Answers

Answer: your anawer is D

Step-by-step explanation:

Find the discriminant of x2 – 5.2 + 2.

Answers

Answer:

Step-by-step explanation:

x² - 5.2x + 2

Discriminant = (-5.2)² - 4 ⋅ 1 ⋅ 2 = 19.04

I need help with this

Answers

i can’t really see sorry could you take a better picture?

Question is in the picture!

Answers

Answer:

[tex]\displaystyle m=\frac{1}{4}[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

Coordinates (x, y)Slope Formula: [tex]\displaystyle m=\frac{y_2-y_1}{x_2-x_1}[/tex]

Step-by-step explanation:

Step 1: Define

Point (80, 20)

Point (120, 30)

Step 2: Find slope m

Simply plug in the 2 coordinates into the slope formula to find slope m

Substitute in points [Slope Formula]:                                                             [tex]\displaystyle m=\frac{30-20}{120-80}[/tex][Slope] Subtract:                                                                                              [tex]\displaystyle m=\frac{10}{40}[/tex][Slope] Simplify:                                                                                               [tex]\displaystyle m=\frac{1}{4}[/tex]

WRITE THE EXPANDED FORM OF THE EXPRESSION
-5/8 (y+x) =

Answers

Answer:

-5/8x -5/8y

Step-by-step explanation:

Use the distributive property to expand

PLEASE HELP MEEE :((((((((

Given the polynomial 21x 4 + 3y - 6x 2 + 34


What polynomial must be subtracted from it to obtain 29x 2 - 7 ?
What polynomial must be added to it to obtain a first degree polynomial?

Answers

Answer:

I don't know

Step-by-step explanation:

ok k ggceyubvsxhik n

If a cordinate set (x,y) has two different scale factors this is a valid transformation..
A-yes
B-no
C-maybe​

Answers

I’m going to say A.yes but I’m not sure sorry.

Point A and Point B are 5 units apart.
aments
The coordinates of Point A are (-1,2).
ndar
The x-coordinate for Point B is -1.
h
What are the possible coordinates for Point B?

Answers

Answer:

[tex]\boxed{\textsf{ The possible values of y is \textbf{ 3 or -3 }.}}[/tex]

Step-by-step explanation:

Here Point A and B are 5 units apart . The coordinates of A are (-1,2) and B is (-1,y) .We need to find the possible coordinates of y . So let's use Distance Formula :-

[tex]\rule{200}2[/tex]

★ Distance Formula :-

If we need to find the distance between two points say , [tex]\sf ( x_1,y_1 ) \:\:\:\: \& \:\:\:\: ( x_2,y_2) [/tex] , then we can find out the distance as ,

[tex]\boxed{\boxed{ \sf Distance =\sqrt{ ( x_2-x_1)^2+(y_2-y_1)^2 } }}[/tex]

[tex]\rule{200}2[/tex]

Put on the respective values ,

[tex]\sf\implies Distance =\sqrt{ ( x_2-x_1)^2+(y_2-y_1)^2 } \\\\\sf\implies Distance = \sqrt{ (-1+1)^2+(2-y)^2}\\\\\sf\implies Distance =\sqrt{ (2-y)^2 } \\\\\sf\implies 5^2 = (2-y)^2 \\\\\sf\implies 5 = \pm (2-y) \\\\\sf\implies 5 = (2-y) \qquad or \qquad 5= -(2-y)\\\\\sf\implies y = 2-5 \qquad or \qquad y = 5-2 \\\\\sf\implies\boxed{\pink{\frak{ y = \pm 3 }}}[/tex]

Each side of a square courtyard is 17 yards long. It costs $28.73 per yard to replace the brick wall around the courtyard. How much would it cost to replace the brick wall?​

Answers

Answer

1953. 64

Step-by-step explanation:

More trig ratios see attachment

Answers

Answer:

TanX = 9/12, WX = 15, TanW = 12/9, CosX = 12/15

Step-by-step explanation:

Tan = opposite/adjacent, so 9/12

WX is the missing side, so solve it by taking the square root of (9^2) +( 12^2) and you get 15

Tan again, is opposite/adjacent, so 12/9

Cos is adjacent/hypotenuse, so 12/15

Hopefully this helps! Let me know if you have any questions

Find the greatest common factor of 9n² and 6m⁴?​

Answers

the GMF of 9n^2 and 6m^4 is 3

Telephone calls arrive at the Global Airline reservation office in Louisville according to a Poisson distribution with a mean of 2.2 calls per minute What is the probability of receiving at least 2 calls during a one-minute interval? What is the probability that at most 2 minutes elapse between 1 call and the next

Answers

Answer:

The answer is "0.6227 and 0.5971".

Step-by-step explanation:

[tex]\to p(x\leq 2)=p(0)+p(1)+p(2)[/tex]

                  [tex]=e^{-2.2}(1+2.2^{1}+\frac{2.2^2}{2!})\\\\=0.6227[/tex]

[tex]\to x \sim emp(\frac{1}{2.2})\\\\\to f(x)=\frac{1}{2.2} emp1-\frac{x}{2.2}[/tex]

[tex]\to p(x \leq 2)=\int^{2}_{0} \frac{1}{2.2} emp1(-\frac{x}{2.2}\ dx[/tex]

                  [tex]=1-emp1-2|2.2\\\\=0.5971[/tex]

Natalie earns $15 per hour. The store offers her a raise-a 4% increase per hour. After the raise, how much will Natalie make per hour?

Answers

Answer:

15,6

Step-by-step explanation:

15×104/100=15,6

She make 15,6$ per hour

I will reward you handsomely with a reward of Brainliest and some points and a 5 star and thanks if you answer these all correctly

Answers

1. 810  

2. 89%

3. 624

4. 100

5. 960

6. 165

I need help pleaseeeeeeeeeee

Answers

Answer:

man  this pmo i cant get the answer lol

Step-by-step explanation:

Guided Practice


The equation s = p – 0.15p represents the sale price s of an item with an original price p, after a 15% discount. A T-shirt costs $12. What is the sale price?



A.
$142.20



B.
$11.85



C.
$13.80



D.
$10.20



THE ANSWER IS NOT: B.
$11.85

Substitute for p and solve for s.

s==p−0.15p12−0.15(12)

Answers

It’s d because 12-15%=10.20

Solve the system of linear equations by substitution.
Y=2x
x +y =-9
The solution of the system is

Answers

Answer:

point form : (-3,-6)   equation form : x= -3 y= -6

Step-by-step explanation:

solve the inequality: PLS SHOW YOUR WORK PLEASE

-45 < 5(p-2)

Answers

Step-by-step explanation:

Given

-45 < 5(p-2)

Dividing both sides by 5

9 < p - 2

Adding two on both sides

9 + 2 < p - 2 + 2

11 < p

or

p > 11

Hope it will help :)❤

Jacob has a bag of marbles that contains 12 red, 5 blue, 8 green.

What is the probability he will select a blue marble?

Answers

Answer:

1:5

Step-by-step explanation:

Answer:

Blue has the least amount of marbles

Step-by-step explanation:

Red has the most, green has 8, but still more than blue. Blue has the least, and the human mind is attracted to things out of the ordinary. It is likely that our friend Jacob will choose a blue marble!

Mary Beth is making 36 flower bouquets. 5/6 of the bouquets are tulips and the rest are roses. How many bouquets are roses?

Answers

Answer:

6

if 5/6 are tulips, that mean 1/6 are roses. you can find 1/6 of 36 by dividing by 6. 36÷6=6

The exchange at a post office is £1 =€1.17
How many euros would you get for £280

Answers

Answer:

327.6 Euros

Step-by-step explanation:

The exchange rate is 1 = 1.17 so to find euros multiply the total pounds by 1.17

280 * 1.17 =

327.6

find the value of given expression

[tex] \sqrt{645 \times 645} [/tex]

Answers

[tex]208012.5[/tex]

Step-by-step explanation:

[tex] \sqrt{645 \times 645} [/tex]

[tex] = \sqrt{416025} [/tex]

[tex] = 208012.5[/tex]

Answer:

√{645×645}=√645²=±645 is your answer

(b) Beth multiplies a number by 3 and divides the answer by 10.
By what fraction has the number been reduced?

Answers

Answer:

hshshsjksbsbsnakakalaoaj you are my world

Jake wants to find out what his customers think of his new recipe. which is the best group survey to find this information?

Answers

what are the answer choices?
Where’s the information?

6+6+75millllllliioooon

Answers

Answer:

75,000,012

Step-by-step explanation:

enjoy, i guess

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