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.

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).

86% of a university's freshman class are majoring in Computer Science. If 8514 students in the freshman class are Computer Science majors, how many students are in the freshman class?

Note: For question 15, your teacher will grade your responses to ensure you receive proper credit for your answers.

Juan and Rita both rode bicycles from the park to Main Street. The graphs below represent the time and distance for each student’s ride. Who rode more slowly? Justify your answer.

What is 35% of 78?

now who keeps sending links lol

m(x)=-5/3x+4
Find m(3)

Given the related graph for each equation, determine which quadratic equation has no real number solutions​

find the value of given expression

[tex] \sqrt{24 \times 24} [/tex]
​

On vacation, you notice that a local taxi cab service offers rides with the following pricing: $1.80 for entering the cab plus $0.47 for each mile driven. How many miles did you travel if your taxi cab fare came to a total of $12.14?

NEED ASAP

Simplify the expression.

4x^2 + 10x - 6
———————
2x-1

-X+ 5
X+3
2(x + 3)
2x-6

`what is the sooulition to x + 8 = 25

HELP ME PLZ :( its similar triangles you can pick both neither or one of the triangles

What number makes the number sentence true?

9x5x2 = 9x

BRAINLIST!!

The number of pages read by eight different students during a one hour reading class was used to create the box plot shown above. Which of the sets of numbers below matches the given box plot?

Dumisani earns R42480 per month. He splits his earnings in the ratio 7:5 and then saves the lesser amount. How much does he save?

Kara is sorting buttons by length for a craft project.The line plot shows of each button.If kara lines up all the 3/4 inch buttons What would be the total

Ryan garden is 20 yards wide. there are about 0.914 meters in 1 yard. About how many meters wide is Ryan's garden? (Decimal number only)

b Two quadrilaterals both have angles 55°, 65°, 95º and 145º
Felix says, 'The two quadrilaterals are similar.
True or false? Explain why.

Please I beg of y'all someone who is good with math- Please help-

1 : The area of a circle is 25π. What is the circumference of that circle? Use 3.14 for π. Do not label your answer

2 : The area of a triangle is 45 cm2. The triangle was dilated. The new image has an area of 20 cm2. What is the scale factor? If the answer is not a whole number, enter it as a fraction, not a decimal.

3 : Which tank has the greater volume?

Tank A has a diameter of 10 ft and a height of 3 ft. Tank B has a diameter of 6 ft and a height of 8 ft

Can you find the median of these 10 numbers?
49
51
57
50
53
65
60
59
60
66

Deondra surveyed 240 of the students in her school about their favorite color.
Students could choose between purple and blue. 15% said their favorite color was
blue. How many students' favorite color was purple?

[tex]16z - (-12z) =[/tex]

write the next three terms of the arithmetic sequence.
5/6, 2/3, 1/2, 1/3, _, _, _,

i will mark as brainliest

Luke wants to cover this wall with blue paint.
7 m
1.6 m
3.6 m
wall
door
6.1 m
He will buy blue paint in 2.5 litre tins.
Each 1 litre of blue paint will cover 8 m2 of the wall.
How many tins of blue paint does Luke need to buy?

Use the table to identify the value of p and q that should be used to factor x^2-3x-10 as (x+p)(x+q) I’ve seen the answer with positive 3x but not a answer for negative

Blueberries are $5.99 a pound Diego buys pounds of blueberries and pays 16.95 write an equation to represent the problem

find the surface area/volume for each

A spinner for a game has 5 equal sections labeled 1-5. why is the probability of spinning a 1 or a 4?

Which set of ordered pairs represents a
function?
A. {(-1, 1), (0,0),(1, 1), (2, 2)}
B. {(3,-3), (2,-2),(1,-1),(1, 1)}
C. ((4,2), (4,-2),(9,3), (9,-3))
D. {(-2,-1), (-2,0),(-2,1),(-2,2)}

can someone help me with this : 4g = 8

A triangle's side lengths are 15 cm and 10 cm. Write an inequality to determinte the possible measure for the missing side length.