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3 years ago

What is meant by a stratified sample?

Mathematics

2 answers:

valina [46]3 years ago

7 0

Answer:

Sampling that is used to represent different groups depending on their different qualities.

Hope that helps. x

snow_lady [41]3 years ago

5 0

Answer:

A stratified random sampling involves dividing the entire population into homogeneous groups called strata (plural for stratum). Random samples are then selected from each stratum. ... A random sample from each stratum is taken in a number proportional to the stratum's size when compared to the population.

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How can you find x in the equation ax-bx+y=z

Brut [27]

$\bf ax-bx+y=z\implies ax-bx=z-y\implies x(a-b)=z-y
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x=\cfrac{z-y}{a-b}$

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3 years ago

Tomas wants to buy a new baseball bat. The one he likes costs $130, but it is on sale for $104. What is the percent of the disco

Minchanka [31]

130-104=26
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Tomas will get a 20% discount if he buys the bat.

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4 years ago

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Helpp pleasee solve for x

Lynna [10]

It's a right angle, which is 90°, 90°-77°=13°

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3 years ago

Evaluate. 4/7+3/4 A. 3/7 B. 37/56 C. 7/11 D. 19/28

Softa [21]

Answer:

its

1.32142857143

Step-by-step explanation:

if its not im sary

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4 years ago

Amir buys a new car for £16470. The value of the car will depreciate by 2% each year. Work out how much amir's car will cost aft

Ronch [10]

Answer:

Amir's car will cost £10348.88 after 23 years.

Step-by-step explanation:

I finally found a UK human!

This is compound interest so you have to find a decimal multiplier and multiply that with £16470 to the power of 23.

The decimal multiplier would be 0.98. This is because you do 100% - 2% as depreciating basically means a decrease, which gives you 98% and then you divide that by 100 to get your decimal multiplier - 0.98.

16470 × $0.98^{23}$ = £10348.88

I hope that helps you!! ^-^

7 0

3 years ago