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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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Marcos reads 3, books in 1 3/4 weeks.

Fofino [41]

Answer:

$x = \frac{12}{7}\ books$

Step-by-step explanation:

Given

$3\ books = 1\frac{3}{4}\ weeks$

Required

Number of books in 1 week

Represent the number of books in 1 week with x.

So, we have:

$3\ books = 1\frac{3}{4}\ weeks$

$x = 1\ week$

Cross Multiply

$x * 1\frac{3}{4} = 3 * 1$

$x * 1\frac{3}{4} = 3$

Convert fraction to improper fraction

$x * \frac{7}{4} = 3$

Multiply through by $\frac{4}{7}$

$x * \frac{7}{4}*\frac{4}{7} = 3 * \frac{4}{7}$

$x = 3 * \frac{4}{7}$

$x = \frac{12}{7}\ books$

<em>Hence: 12/7 books were read in a week</em>

7 0

3 years ago

Roman has 2 red pencils in his backpack. If this is 25% of the total number of pencils, how many pencils are in his backpack?

MrRa [10]

2 = 25%. 25% also means 1/4. So, it is a quarter of something. So. So find 100%, you have to multiply 2 by 4. 2 * 4 = 8. Roman has 8 pencils in his backpack.

6 0

4 years ago

Read 2 more answers

An aquarium sells five stuffed animal sharks for $64.95. What is the cost of eight stuffed animal sharks?

Gekata [30.6K]

$103.92

Process:
64.95/5 = 12.99, 12.99 x 8 = 103.92

8 0

3 years ago

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Which are the prime factors of the polynomial 24x4 – 3x? Check all that apply.

Luba_88 [7]

The prime factors of the polynomial 24x4 – 3x are 3x, 2x -1 and (4x2 + 2x + 1)