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muminat
2 years ago
5

A researcher wants to compare the effect of a new type of shampoo on hair condition. The researcher believes that men and women

may react to the shampoo differently. Additionally, the researcher believes that the shampoo will react differently on hair that is dyed. The subjects are split into four groups: men who dye their hair; men who do not dye their hair; women who dye their hair; women who do not dye their hair. Subjects in each group are randomly assigned to the new shampoo and the old shampoo. This experiment
a. has three factors (shampoo type, gender, whether hair is dyed).
b. has two factors (shampoo type and whether hair is dyed) blocked by gender
c. has one factor (shampoo type), blocked by gender and whether hair is dyed.
d. has two factors (gender and whether hair is dyed) blocked by shampoo type.
e. is completely randomized. (Old exam question)
Mathematics
1 answer:
cupoosta [38]2 years ago
8 0

Answer:

This experiment has three factors (shampoo type, gender, whether hair is dyed)

Step-by-step explanation:

the researcher is trying to make a comparison between an old shampoo and a new on and also was gender sensitive as she considers their hair coloration too because it affects the result slightly.

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According to the Pew Research Center, the proportion of the American population who use only a cellular telephone (no landline)
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Answer:

Answer =b. Since the p-value > α, do not reject the null hypothesis.

Step-by-step explanation:

The null hypothesis is to be rejected if the p- value is less than the given significant level. In this case, the p-value is 0.418 and level of significance α=0.05; the p-value is greater than level of significance therefore we do not reject the null hypothesis.

7 0
2 years ago
Triangle J K L is shown. Angle J K L is a right angle. An altitude is drawn from point K to point M on side J L, forming a right
vredina [299]

Answer:

1, 4, 5

Step-by-step explanation:

Consider right triangle JKL with right angle JKL and height KM. This height divides triangle into two right triangles KML and KMJ.

Note that

m\angle MKL=90^{\circ}-m\angle MLK=m\angle KJM\\ \\m\angle JKM=90^{\circ}-m\angle KJM=m\angle MLK

So, by AA theorem, we have three similar triangles

\triangle JKL\sim \triangle JMK\sim \triangle KML

So, options 1, 4 and 5 are true

4 0
2 years ago
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Es urgente ¡¡¡ si la MH de a y 4 es 6 y la MH de 8 y b es 12 calcula la MH de a y b
TiliK225 [7]

Answer:

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Con esto podemos encontrar el valor de a:

8*a/(a+ 4) = 6

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2a = 24

a = 24/2 = 12.

Tambien sabemos que:

MH(8,b) = \frac{2*8*b}{8+b} =\frac{16*b}{8+b} = 12

Y de ahí podemos despejar b:

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7 0
2 years ago
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Hoochie [10]
One of the easiest question I've seen.
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9 0
2 years ago
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Anastaziya [24]

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2) u is the independent variable.

6 0
2 years ago
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