Suppose that 55% of the approximately 4,000 school-aged children in the county have vitamin deficiency.
A nutritionist takes a cluster random sample of 100 those children. They test the children for vitamin
deficiency. They provide the children with vitamin-rich snacks at school for three months, then retest them.
They plan to look at the difference (after – before) between the proportions of children with vitamin
deficiency.
Consider the formula:
OPA-PB =
PA (1 - PA) PB (1 - PB)
+
пA
пр
Why is it not appropriate for the nutritionist to use this formula for the standard deviation of PA - PB?
Choose 1 answer:
The samples are not independent of each other.
We cannot assume independence for the students sampled before receiving the snacks.
We cannot assume independence for the students sampled after receiving the snacks.

Answers

Answer 1

Answer: A

The samples are not independent of each other.

Explanation: Khan Answer

They are testing the same sample of students both times. Results from the first test would likely give us information about the results from the second test.

Answer 2

The F-test is used to determine whether the variances of two populations are equal (Snedecor and Cochran, 1983). It is possible for this test to have one or two tails. The two-tailed version compares the variances' equality with the alternative. Thus, option A is correct.

What nutritionist use formula for standard deviation?

Rejecting a null hypothesis that is actually true in the population results in a type I error (false-positive); failing to reject a null hypothesis that is actually untrue.

To calculate how much your values (data points) normally deviate from the mean value, use the standard deviation formula. In other words, the standard deviation tells you how much your data vary.

Therefore, The samples are not mutually exclusive. After giving the kids nutritious snacks at school for three months, they retest the kids.

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Related Questions

A grocery store is selling 6 cans of cat food for $3. Write and solve a multiplication equation to find the cost of a can of cat food.
The cost of one can of cat food is 2 $
The cost of one can of cat food is 120$
The cost of one can of cat food is 16 $

Answers

Answer:

A

Explanation:

The cost of each can should be 50¢. .50 x 6 cans would give you the $3.

___ is paid or unpaid temporary that allows someone to learn about a particular company

Answers

Answer:

internship

...................

Answer:

Internship

Explanation:

Describe the functions and origin of mass communication.

Answers

The first function of mass communication is to serve as the eyes and ears for those seeking information about the world. The internet, televisions, and newspapers are the main sources for finding out what's going around you.

These two right cylinders have the same height, 25 centimeters. The radius of the smaller cylinder is 5 centimeters and the radius of the larger cylinder is 3 times greater than that of the smaller cylinder. What is the ratio of the volume of the larger cylinder to the volume of the smaller cylinder? A. 6:1 B. 12:1 C. 9:1 D. 25:1

Answers

9514 1404 393

Answer:

  C.  9:1

Explanation:

The volume is proportional to the square of the radius. When the ratio of radii is 3 : 1, the ratio of volumes is 3^2 : 1^2 = 9 : 1.

Answer:C! 9:1

Explanation:

The ATT Building (IE Batman Building) in Nashville is 614 feet tall. A model of the building is 60 inches tall. What is the ratio of the height of the model to the height of the actual ATT Building?

Answers

Answer:

Ratio of height of model to height of the actual Building = 5 : 614

Explanation:

Given:

ATT Building height = 614 feet tall

Model of building = 60 inches tall

Find:

Ratio of height of model to height of the actual Building

Computation:

ATT Building height = 614 feet tall = 614 x 12 = 7,368 inch

Ratio of height of model to height of the actual Building = Model of building / ATT Building height

Ratio of height of model to height of the actual Building = 60 / 7,368

Ratio of height of model to height of the actual Building = 5 : 614

The Ratio of the height of the model the actual ATT Building is 5 / 614

Equation

An equation is an expression used to show the relationship between two or more numbers and variables.

12 inches = 1 feet.

Height of model = 60 inches = 60 in. * 1 ft. per 12 in. = 5 ft.

Ratio of the height of the model the actual ATT Building = 5 / 614

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Which of the following is not an effective study strategy?
A) spacing.
B) interleaving
C) practice testing
D) All of the above.
C) None of the above.

Answers

It’s B) Interleaving

Methods of study which improves an individual's understanding and retention are said to be effective. Hence, from the options given, interleaving does not seem to be an effective.

Spacing encourages long hours of study in other to grasp the root of a concept rater than trying to memorize or cram the notes within a short period.

Practice testing is used to evaluate one's ability or grasp of the information by testing one's knowledge using tentative exercises.

Interleaving involves mixing or studying more than one subject or knowledge domain at a time. In most cases, these concept leads to confusion and might work for others.

Therefore, the most appropriate option is B.

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patient has been eating healthy foods, but her respiratory system is not working as well as it usually does. Can this patient still exercise normally?

Answers

Answer:

i hope this is helpful..

Explanation:

a patient has been eating healthy foods, but her respiratory system is not working as well as it usually does. ... Yes, her body can get everything it needs for energy from molecules in food. No, her respiratory system does not have enough oxygen to combine together to release energy.

¿Qué realidades se ven representadas en la película? Anotalas para, en unos días, debatir en clase acerca de los problemas que se exponen.

Answers

If you write in english language maybe i can help you

If 2x – 1 = 9, what is 10x – 5?

Answers

Answer:

45

Explanation:

2x-1=9

+1

2x=10

÷2

x=5

10(5)-5

50-5=45

hope it helps :)

brainlist pls

Answer:

45

Explanation:

First we find the value of x, i.e.

2x – 1 = 9,

=> 2x = 9 + 1

=> 2x = 10

[tex] = > x = \frac{10}{2} [/tex]

=> x = 5

As we have got the value of x so now,

10x – 5

= (10 × 5) - 5

= 50 - 5

= 45 (Ans)

The league mean batting average is 0.280 with a known standard deviation of 0.06. The Rattlers and the Vikings belong to the league. The mean batting average for a sample of eight Rattlers is 0.210, and the mean batting average for a sample of eight Vikings is 0.260. There are 24 players on the Rattlers and 19 players on the Vikings. Are the batting averages of the Rattlers and Vikings statistically different? Explain in detail and show your steps here

Answers

Answer:

ummm

Explanation:

Could someone tell me what SAT means

Answers

SAT stands for Scholastic Aptitude Test

SAT stands for Scholastic Aptitude Test.

He could not understand Della’s _________, her constant locking of doors and windows as if to protect herself from some __________ threat.
paranoia .. unspecified
glee .. manifest
actions .. global
kindness .. imminent
candor .. qualified

Answers

Paranoia, unspecified

(2x+5)(-mx+9)=0


In the equation above, m is a constant. If the equation has the solutions x=-5/2 and x=3/2, what is the value of m

Answers

(2(3/2)+5)(-m(3/2)+9)=0
(3+5)(-(3/2)m+9)=0
(8)(-(3/2)m+9)=0
-12m+72=0
-12m=-72
M=6

A bureaucrat Who had no help with dancing professionally still follow every rule even want to slow down his work and personal growth according to strain theory which type of deviance does his behavior illustrate

Answers

Ritualism. Good luck on the rest of your work.

Answer:

rulism. have fun, stay safe and send it.

Explanation:

how do you make soul food im white by the way

Answers

Answer:

buy some chicken and mac and cheese green beans and corn flour the chicken if you don't have a fryer buy one and season the green beans with minced garlic adobo seasoning garlic salt and you can free style on the fried chicken but you have to put chicken buoillon

On a certain hot​ summer's day, 185 people people used the public swimming pool.The daily prices are $1.25 for children and $2.00 for adults. The receipts for admission totaled $335.50.How many children and how many adults swam at the public pool that​ day?

Answers

Answer: 139 adults and 46 children. Did you not get this? I'm in 8th grade!!!!!!!

Explanation: a=adults, c=children

Rewrite equations:

a+c=185

2a+1.25c=335.5

Step: Solve a+c=185for a:

a+c=185

a+c+−c=185+−c (Add -c to both sides)

a=−c+185

Step: Substitute −c+185 for 'a' in 2a+1.25c=335.5:

2a+1.25c=335.5

2(−c+185)+1.25c=335.5

−0.75c+370=335.5 (Simplify both sides of the equation)

−0.75c+370+−370=335.5+−370 (Add -370 to both sides)

−0.75c=−34.5

−0.75c

−0.75

=

−34.5

−0.75

(Divide both sides by -0.75)

c=46

Step: Substitute 46 for 'c' in 'a' =−c+185:

a=−c+185

a=−46+185

a=139(Simplify both sides of the equation)

Answer:

a(adults)=139 and c(children)=46

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