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laila [671]
3 years ago
5

A manufacturer is running an experiment using the standard (control) infant formula, and two new formulas, A and B. The goal is

to boost the immune system in infants. 120 infants in the study are randomly assigned to each of three groups: Group A, Group B, and a Control Group. The study is run for 12 weeks. At the end of the study the variable measured is Total IGA (in mg per dl) score. A one-way ANOVA on these data is employed. The hypothesis tested by the one-way ANOVA F test are:
Mathematics
1 answer:
bulgar [2K]3 years ago
5 0

Answer:

A.

H0: the mean IGA score is the same for all three formulas.


Ha: the mean IGA score is not the same for all three formulas.

The Group of answer choices are as below:

A.

H0: the mean IGA score is the same for all three formulas.


Ha: the mean IGA score is not the same for all three formulas.

B.

H0: the mean IGA score is the same for all three formulas.


Ha: the mean IGA score is higher for at least one of the two treatment groups than the control group

C.

H0: the mean IGA score is the same for all three formulas.


Ha: the mean IGA score is higher for both treatment groups A and B than the control group.

D. No answer text provided.

Explanation:

Given that a manufacturer is running an experiment using the standard (control) infant formula, and two new formulas, A and B to boost the immune system in infants.

The variable that is measured is Total IGA (in mg per dl) score.

We have to state the hypotheses for one-way ANOVA F test to test if the mean IGA score is the same for all three formulas.

In null hypothesis H0, the mean of all groups are equal and in alternative hypothesis, Ha, the mean of the groups are not the same.

Therefore, the hypothesis tested by the one-way ANOVA F test are:

H0: the mean IGA score is the same for all three formulas.

Ha: the mean IGA score is not the same for all three formulas.

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Step-by-step explanation:

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16/25 × (625/ 81)

10000/ 2025

400/81

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Solve the system of equations using substitution and Elimination
juin [17]
<h2>Greetings!</h2>

Answer:

y = \frac{-18}{7} and x = \frac{50}{7}

Step-by-step explanation:

To solve simultaneous equations, you need to have the number in front of both x's or y's the same. (signs doesn't matter)

To get -x to -10x we simply  need to multiply the first equation by 10:

-x * 10 = -10x

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16 * 10 = 160

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Now we can add the two equations:

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Now plug \frac{-18}{7} into the second equation:

10x + 20(\frac{-18}{7}) = 20

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Move the \frac{360}{7} over to the other side, making it a positive:

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3 years ago
Mary purchases four book online. The book were the same price each, and the shipping fee was $7.25. If the total cost was $55.25
Sonja [21]

Answer:

The price per book that Mary purchased is $12

Step-by-step explanation:

Mary's total cost can be expressed as;

C=(p×n)+s

where;

C=total cost

p=price per unit of books

n=number of books purchased

s=shipping fee

In our case;

C=$55.25

p=unknown

n=4

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replacing;

55.25=(4×p)+7.25

4 p+7.25=55.25

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4 p=48

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p=12

The price per book that Mary purchased is $12

6 0
3 years ago
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