Ask question

Ask question

All categories

2 years ago

13

In an experimental study, a lab wanted to divide volunteers into two

1 answer:

fredd [130]2 years ago

3 0

Step-by-step explanation:

Assigning the participants based on who shows up first would introduce bias. Those who arrive first may be more likely to already be punctual. Giving or not giving them the app may make it seem ineffective when it isn't.

You might be interested in

Budget planners in two towns, Alphaville and Betaville, developed models to determine the budget surplus (in dollars) for a year

kramer

Answer:

(a) $-3x^2+150x-10000$

(b) $-\$16,863,760,000$

Step-by-step explanation:

Alphaville's Budget Surplus Model is $-2x^2+ 500x$

Betaville's Budget Surplus Model is $x^2- 100x + 10000.$

We want to determine the expression that shows how much greater Alphaville’s annual budget surplus is than Betaville’s for a particular amount of tax revenue.

To do this, we subtract Betaville's Model from Alphaville's model.

$-2x^2+ 500x-(x^2- 100x + 10000)\\$

Opening the brackets

$-2x^2+ 500x-x^2+100x - 10000\\$

Collect like terms and simplify

$-2x^2-x^2+100x + 500x- 10000\\=-3x^2+150x-10000$

The expression that shows how much greater Alphaville's Budget is:

$-3x^2+150x-10000$

(b) If the tax revenue that year in each town is $75,000

We want to evaluate the expression derived above when the tax revenue that year in each town is $75,000 i.e.at x=75000

$-3x^2+150x-10000\\=-3(75000)^2+150(75000)-10000\\=-\$16,863,760,000$

3 0

2 years ago

Which is more economical: purchasing the economy size of a detergent at 7 kilograms for $7.15 or purchasing the regular size a

Kruka [31]

Regular size saves $0.0003 per gram I think
someone pls fact check me

8 0

2 years ago

Assume that in a statistics class the probability of receiving a grade of A equals .30 and the probability of receiving a grade

Tom [10]

Answer:

Answer D is correct

6 0

2 years ago

Find the derivative of f(x) = 11x2 + 5x at x = 9.

Yakvenalex [24]

F(x) = 11x² + 5x

f'(x) = 22x + 5

Hence,

f'(9) = (22 * 9) + 5 = 198 + 5 = 203

3 0

2 years ago

Read 2 more answers

How many unique ways are there to arrange the letters in the word SONG?

-BARSIC- [3]

24 I believe would be the correct answer.

6 0

2 years ago