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nata0808 [166]
2 years ago
11

To test the effect of day care on academic performance in young children, a researcher plans to use two groups of 5-year-olds fr

om the same kindergarten class: One group is made up of randomly selected children who attended day care, and the other group includes randomly selected children who did not attend any day care prior to attending kindergarten. Both groups will complete a brief test of academic performance during a class. Which type of test should the researcher use to compare the mean scores of the two groups
Mathematics
1 answer:
algol132 years ago
4 0

Answer:

completely Randomized block design

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Can you solve this?
marusya05 [52]

Answer:

D

Step-by-step explanation:

The area (A) of a trapezoid is calculated as

A = 0.5h(a + b)

where h is the perpendicular height and a, b the parallel sides.

Given A = 120, then

0.5 × 8(a + b) = 120, that is

4(a + b) = 120 ( divide both sides by 4 )

a + b = 30 cm → D

5 0
3 years ago
Can someone please help with these volume equations? 10th grade geometry. will reward brainly
prisoha [69]

Answer:

First picture - 20.42 m

Second picture - 12.9 m

Step-by-step explanation:

------------------------------------------------------------------------------------------------------------

Formula for pyramid:

V=b^2\frac{h}3

Where,

b = base - 3.5 m

h = height - 5 m

Thus,

V=3.5^2\frac{5}{3}

20.41667m^3 ≈ 20.42m^3

------------------------------------------------------------------------------------------------------------

Formula for pyramid:

V=b^2\frac{h}3

Where,

b = base - 3 m

h = height - 4.3 m

Thus,

V = 3^2\frac{4.3}{3}

12.9m^3

------------------------------------------------------------------------------------------------------------

<u><em>Kavinsky</em></u>

6 0
2 years ago
100 POINTS
enyata [817]

Answer:

C

Step-by-step explanation:

Given Coordinates:

(-4, -2), (2, -2), (4, 2), (-2, 2)

The shape that uses the coordinates (-4, -2), (2, -2), (4, 2), (-2, 2) would make a parallelogram.

See graph for answer:

So correct choice is C.

8 0
3 years ago
Read 2 more answers
Which pair of ratios form a proportion?
boyakko [2]
5:8 and 20:32 would be a proportion.

Easy way to find this:
Set up the proportion as a fraction.
Use the cross product property. Multiply the diagonals and if the products of the diagonals are the same, then they are proportional.
3 0
3 years ago
Read 2 more answers
Solve for x<br> 4 (æ – 6) = 8
iogann1982 [59]

Answer:

8im thinking

Step-by-step explanation:

but is ae the x?

8 0
3 years ago
Read 2 more answers
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