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3 years ago

What is the difference between a confounding and a lurking variable?

Mathematics

2 answers:

Gennadij [26K]3 years ago

4 0

Answer:

A lurking variable is a variable that has an important effect on the relationship among the variables in the study, but is not one of the explanatory variables studied. Two variables are confounded when their effects on a response variable cannot be distinguished from each other.

murzikaleks [220]3 years ago

4 0

Answer:

A lurking variable is a variable that has an important effect on the relationship among the variables in the study. Two variables are confounded when their effects on a response variable cannot be distinguished from each other.

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Consider the two functions. Which statement is true?

sladkih [1.3K]

I believe it's C. Mainly answering so you can give out Brainliest, good luck on your test.

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4 years ago

The given series has six terms. what is the sum of the terms of the series? 10 + 25 + 40 + . . . + 85

tatiyna

10+25+40+55+70+85
35+95+155
130+155
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answer: 285

4 0

3 years ago

Read 2 more answers

Help please no rush

s2008m [1.1K]

To solve this, we take the number of subjects who weren't diabetic, and then divide them by the total number of subjects who took the test:

Probability = $\frac{28}{3+28}$
= $\frac{28}{31}$
= 0.903225..
= 0.90 (rounded)
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Answer:

So the probability of randomly selecting a subject who was not diabetic would be 0.90 (the final option)

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Note:
 We only used the numbers under 'Negative Test', because the question wanted the probability 'given that the test result was negative'

6 0

4 years ago

Metal Fabrication If an open box is made from a tin sheet 10 in. square by cutting out identical squares from each corner and be

MrRa [10]

Answer:

ength (l) : (10-2*5/3) = 20/3
width(w): (10 - 2*5/3) = 20/3
height(h): 5/3

Step-by-step explanation:

Let x is the side of identical squares

By cutting out identical squares from each corner and bending up the resulting flaps, the dimension are:

length (l) : (10-2x)
width(w): (10-2x)
height(h): x

The volume will be:

V = (10-2x) (10-2x) x

<=> V = (10x-2 $x^{2}$ ) (10-2x)

<=> V = 100x -20 $x^{2}$ - 20 $x^{2}$ + 4 $x^{3}$

<=> V = 4 $x^{3}$ - 40 $x^{2}$ + 100x

To determine the dimensions of the largest box that can be made, we need to use the derivative and and set it to zero for the maximum volume

dV/dx = 12 $x^{2}$ -80x + 100

<=> 12 $x^{2}$ -80x + 100 =0

<=> x = 5 or x= 5/3

You know 'x' cannot be 5 , because if we cut 5 inch squares out of the original square, the length and the width will be 0. So we take x = 5/3

length (l) : (10-2*5/3) = 20/3
width(w): (10 - 2*5/3) = 20/3
height(h): 5/3

6 0

3 years ago

So far, Keith has burned 604.3 calories. He wants to burn a total of 700 calories. How many more calories must Keith burn?

Vanyuwa [196]

So to do this you need to use subtraction to find it how many more calories he needs to burn 700. so you would do 700 - 604.3 to get an answer of 95.7! :)

7 0

3 years ago