2 years ago

Identify the type of sample and whether it is a biased or unbiased sampling method.

Mathematics

1 answer:

iris [78.8K]2 years ago

4 0

Answer:

1. biased

2. unbiased

3. unbiased

4. biased

5. unbiased

Step-by-step explanation:

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2 years ago

Angela tried to solve an equation step by step. \begin{aligned} \dfrac34+m&=\dfrac54\\\\ \dfrac34+m-\dfrac34&=\dfrac54+\

Liono4ka [1.6K]

Answer:

The mistake she made was ; She didn't change the sign when subtracting -3/4 from both sides

She wrote 5/4+3/4 instead of 5/4-3/4

Step-by-step explanation:

Correct solution:

$\frac{3}{4} + m = \frac{5}{4}$

Subtract-3/4 from both sides

$\frac{3}{4} - \frac{3}{4} + m = \frac{5}{4} - \frac{3}{4}$

Simplify

$m = \frac{5}{4} - \frac{3}{4} \\ m = \frac{1}{2}$

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MatroZZZ [7]

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2 years ago

A train travels 250 miles at a constant speed (x), in miles per hour.Enter an equation that can be used to find the speed of the

Nastasia [14]

The first thing we must do for this case is to take into account the following variable:
x = speed in miles per hour
Then, by definition we have to:
d = v * t
Where,
d: distance
v: speed
t: time
Substituting values:
250 = x * 5
Answer:
An equation that can be used to find the speed of the train is:
250 = x * 5

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2 years ago

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