3 years ago

Why might a researcher use a sample rather than an entire population for their study?

Mathematics

1 answer:

cestrela7 [59]3 years ago

6 0

Answer:

Step-by-step explanation:

its easier to take a group of 100 or something random people than a whole population.

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seropon [69]

Add your two totals together,
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$8261.07 is the total cost.

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Grace sold 5/8 of her stamp collection what is this amount as a decimal

fenix001 [56]

0.625
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Lisa's age is 4 yrs. older than three times Sammy's age. Lisa is 28 yrs. old. Let's represent Sammy's age.

masha68 [24]

Answer:

Step-by-step explanation:

So it'd be

28=3s+4

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2 years ago

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Jlenok [28]

Answer:

A) r x 2 = g

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Step-by-step explanation:

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2 years ago

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What is the present value of $3,000 per year for 9 years discounted back to the present at 10 percent?

Studentka2010 [4]

Answer:

$17,277.07

Step-by-step explanation:

Present value of annuity is the present worth of cash flow that is to be received in the future, if future value is known, rate of interest is r and time is n then PV of annuity is

PV of annuity = $\frac{P[1-(1+r)^{-n}]}{r}$

= $\frac{3000[1-(1+0.10)^{-9}]}{0.10}$

= $\frac{3000[1-(1.10)^{-9}]}{0.10}$

= $\frac{3000[1-0.4240976184]}{0.10}$

= $\frac{3000(0.5759023816)}{0.10}$

= $\frac{1,727.7071448}{0.10}$

= 17,277.071448 ≈ $17,277.07

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3 years ago