3 years ago

PLEASE HELP VERY URGENT!!!!

Mathematics

2 answers:

Marrrta [24]3 years ago

4 0

Answer:

A or B

Step-by-step explanation:

Also i need help to

zheka24 [161]3 years ago

3 0

Answer:

A. $\sqrt{16}$ × $\sqrt{4}$

I hope this helps!

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80% of the students in Lea’s class earned an A or a B on the weekly math test. If 20 students got an A or a B, how many students

Anna35 [415]

Answer:

80 ÷ 4 = 20, so 100 ÷ 4 = 25 students

Step-by-step explanation:

Is means equals to and of means multiply

20 = 80% * N

20 = .80 N

Divide each side by .8

20 / .8 = N

25 = N

there are 25 students

6 0

3 years ago

Read 2 more answers

For an independent-measures research study (i.e., independent measures t Test), the data show an 8-point difference between the

zloy xaker [14]

Answer:

C. 2

Step-by-step explanation:

Cohen's d is a parameter used to express the standardised difference between two means. It is defined as the difference between the means divided by the pooled standard deviation.

In this case, the difference between both means (M2-M1) is 8. As for the pooled standard deviation, simply take the square root of the given pooled variance:

$S=\sqrt{S^2}\\S=\sqrt{16} \\S= 4$