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katen-ka-za [31]
3 years ago
11

A treatment is administered to a sample of n = 9 individuals selected from a population with a mean of m = 80 and a standard dev

iation of s = 12. after treatment, the effect size is measured by computing cohen's d, and a value of d = 0.50 is obtained. based on this information, what is the mean for the treated sample?
Mathematics
1 answer:
kupik [55]3 years ago
5 0
Cohen's d is calculated according to the formula:
d = (mean difference) / standard deviation
0.5 = mean difference / 12
Therefore, mean difference = 6
Since we have a population mean of 80, the sample mean must be 80 + 6 = 86.
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A gallon of paint will cover 300 square feet surface area. how many gallons are needed to cover a rectangle surface 600 feet by
snow_lady [41]
Close. The answer is 40. 1 gallon of paint covers 300 square feet. Square feet is the units of area. So you are provided with the dimensions of the rectangle. 20 X 600. When you multiply that you get 12000. 12000 divides by 300 is 40.
3 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
almond37 [142]

Answer:  742

<u>Step-by-step explanation:</u>

The given sequence {27, 31, 35, ... } provides the following information:

  • the first term (a₁) = 27
  • the difference (d) = 4

We can use the information above to find the explicit rule of the sequence:

a_n=a_1+d(n-1)\\.\quad =27+4(n-1)\\.\quad =27+4n-4\\.\quad =23+4n

We can use the explicit rule to find the 14th term (a₁₄)

a_n=23+4n\\a_{14}=23+4(14)\\.\quad =23+56\\.\quad =79

Next, we can input the first and last term of the sequence into the Sum formula:

S_n=\dfrac{a_1+a_n}{2}\times n\\\\S_{14}=\dfrac{a_1+a_{14}}{2}\times 14\\\\.\quad =\dfrac{27+79}{2}\times 14\\\\.\quad =\dfrac{106}{2}\times 14\\\\.\quad =53\times 14\\\\.\quad =742

3 0
3 years ago
Read 2 more answers
Please help asap!!!!!
Leya [2.2K]

Answer:

c

Step-by-step explanation:

th two lines on each side of the x means absolute value. meaning the negative signs don't matter... l-4l=4

4 0
4 years ago
5. Solve the equation. 8/x+3 = 1/x+1
Helga [31]

Answer:

x = -5/7

Step-by-step explanation:

8               1

---------- = ----------

x+3           x+1

Using cross products

8 (x+1) = 1 (x+3)

Distribute

8x+8 = x+3

Subtract x from each side

8x-x +8 = x-x+3

7x+8 =3

Subtract 8 from each side

7x +8-8 =3-8

7x = -5

Divide each side by 7

7x/7 = -5/7

x = -5/7

4 0
4 years ago
"A ramp rises 1.5 feet for every 18 feet of horizontal distance it covers."
pishuonlain [190]
A ramp rises 1.5 feet <em>for </em>every 18 feet of horizontal distance. Basically the <em>for</em> is what gives it away. You could also just go with the fact that the x variable normally goes left to right (horizontal) and y goes up and down (Rises and falls) which gives you the same thing. The 1.5 feet is y and 18 feet is x
8 0
3 years ago
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