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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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Determine algebraically whether the function is even, odd, or neither even nor odd.
ololo11 [35]

Answer:

odd

Step-by-step explanation:

Just so you know there are shortcuts for determining if a polynomial function is even or odd. You just to make sure you use that x=x^1 and if you have a constant, write it as constant*x^0 (since x^0=1)

THEN!

If all of your exponents are odd then the function is odd

If all of your exponents are even then the function is even

Now you have -4x^3+4x^1

3 and 1 are odd it is an odd function

This a short cut not the legit algebra way

let me show you that now:

For it to be even you have f(-x)=f(x)

For it be odd you have f(-x)=-f(x)

If you don't have either of those cases you say it is neither

So let's check

plug in -x  -4(-x)^3+4(-x)=-4*-x^3+-4x=-4x^3+-4x

that's not the same so not even

with if we factor out -1 .... well if we do that we get -(4x^3+4x)=-f(x)

so it is odd.

6 0
3 years ago
PLSSS HELP IF YOU TURLY KNOW THISS
Ymorist [56]

Answer:

B

Step-by-step explanation:

3 out of 10 is smaller than 3 out of 5

4 0
2 years ago
Read 2 more answers
(-3,-2) and (-8,4)<br> what is the distance between them in radical form
nexus9112 [7]

Answer:(-4,5)

Step-by-step explanation:If you put (-3,2) and (-8,4) on a number line then it would be (-4,5).

7 0
3 years ago
Joni has a circular garden with a diameter of 14 1/2 feet if she uses 2 teaspoons of fertilizer for every 25 square feet of gard
alina1380 [7]

Answer:

13.20 teaspoon of fertiliser needed for entire garden.

Step-by-step explanation:

Diameter of the garden = 14.50 ft

Radius of the garden = 7.25 ft

Area

[tex]A=\pi r^2[/text]

[tex]A=\pi \times 7.25 \times 7.25[/text]

[tex]\pi=3.14[/text]

[tex]A=\pi \times 7.25 \times 7.25[/text]

[tex]A=3.14 \times 7.25 \times 7.25[/text]

Hence

[tex]A=165.046[/text]

Area is 165.046 Sq Ft

For 25 sq ft of fields the fertiliser needed = 2 tea spoon

For 1 sq ft of fields the fertiliser needed =

[tex]\frac{2}{25}[/text] tea spoon

For 165.046 sq ft of fields the fertiliser needed =

[tex]\frac{2 \times 165.046 }{25}[/text] tea spoon

For 165.046 sq ft of fields the fertiliser needed = 13.20 tea spoon

6 0
2 years ago
Helppppppppppppppppp​
Sergeeva-Olga [200]
<h2>Answer: </h2>

15% of $49.64

=> 15/100 × 49.64

=> $7.446.

<u>After rounding to the nearest ten</u>,

=> <u>$7.5</u>

8 0
2 years ago
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