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adoni [48]
3 years ago
5

Twenty randomly selected statistics students were given 15 multiple-choice questions and 15 open-ended questions, all on the sam

e material. The professor was interested in determining if students scored higher on the multiple-choice questions. This experiment is an example of ______.
Mathematics
1 answer:
nadya68 [22]3 years ago
8 0

Answer:

A paired T- Test

Step-by-step explanation:

In a paired sample t-test, every entity is measured two times(twice), resulting in pairs of observations. It is used to determine whether the mean difference between two sets of observations is zero or not.

An example would be to measure performance of patients before and after the medicine and analyze difference using sample paired t test.

<u><em /></u>

<em>Here, in the given statement, each student is provided with 15 multiple choice questions and 15 open ended questions on same material. It can also be inferred as each student given two sets of same material and their performance was being observed. Hence, it is a paired t-test.</em>

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Which value represents the horizontal translation from the graph of the parent function f(x) = x^2 to the graph of the function
Vsevolod [243]
Translation by h (right) and k (up)
g(x)=f(x-h)+k
=f(x-4)^2+2
so h=4, k=2
horizontal translation (to the right) is h=+4, but is shown as -4 for the translation value.

7 0
3 years ago
Pls i cannot fail this !
FrozenT [24]
A= 3.14* 12^2
= 3.14* 144
= 452.16cm^2
3 0
3 years ago
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What is another name for the height of a pyramid?
Lyrx [107]
Answer c

Another name for the height of a pyramid is the altitude of the pyramid.
6 0
3 years ago
Wanda is working on her predictions for the next few days. She calculates that there is a 20% chance of rain on Monday and a 20%
Mariana [72]

Answer:

36%

Step-by-step explanation:

the <em>complement </em>of it raining on at least one of these days = it not raining on any day

this means that if it does not rain on at least one day, it does not rain on any day

thus,

1 - probability of it not raining at all = probability it rains at least one day

probability it doesn't rain on monday = 1- 20% = 80%

probability it doesn't rain on tuesday = 1 - 20% = 80%

probability it doesn't rain on monday AND it doesn't rain on tuesday = probability it doesn't rain at all

P(A and B) = P(A) * P(B) = 0.8 * 0.8 = 0.64

1 - 0.64 = 0.36 as our answer

8 0
2 years ago
What is the slope of a line perpendicular to the line whose equation is 3x+6y=-183x+6y=−18. Fully reduce your answer.
schepotkina [342]

Answer:

2

Step-by-step explanation:

The given equation of line is

3x+6y=-18

We need to find the slope of a line which is perpendicular to the given line.

The given equation can be rewritten as

3x+6y+18=0      ...(i)

If a line is defined as ax+bx+c=0, then the slope of the line is  

m=-\dfrac{a}{b}

In equation (i), a=3, b=6 and c=18. So, slope of the line is

m_1=-\dfrac{3}{6}=-\dfrac{1}{2}

Let m_2 be the slope of perpendicular line.

We know that product of two perpendicular line is -1.

m_1\cdot m_2=-1

(-\dfrac{1}{2})\cdot m_2=-1

Multiply both sides by -2.

m_2=2

Therefore, the slope of perpendicular line is 2.

6 0
3 years ago
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