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Temka [501]
3 years ago
13

Say youre going to conduct a t procedure for the difference between the means of two populations. You decide the samples of size

s 12 and 15 are independent. Which of the following statements are true?
1. If we pool variances the number of degrees of freedom is 25.
2. If we don't pool and we don't have access to software to compute the degrees of freedom the number of degrees of freedom is 11.
3. For a given level of confidence c a confidence interval based on 11 degrees of freedom will be wider than one based on 25 degrees of freedom.
Mathematics
1 answer:
stiv31 [10]3 years ago
6 0

Answer:

all 3 are correct.

I

II

III

you're welcome

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If 4 + 6 = 10, does (4 + 6) X 3= 10 X 3? Why or why not?​
spayn [35]
Answer: Yes, they equal

Explanation: (4 + 6) x 3 = 30 ; 10 x 3 = 30, 30 = 30
3 0
2 years ago
What value of a is a solution to this equation?<br> 1=3+a<br> 4
Romashka-Z-Leto [24]

Answer:

1=a4+3

Step 1: Subtract a^4+3 from both sides.

1−(a4+3)=a4+3−(a4+3)

−a4−2=0

Step 2: Add 2 to both sides.

−a4−2+2=0+2

−a4=2

Step 3: Divide both sides by -1.

−a4

−1

=

2

−1

a4=−2

Step 4: Take root.

a=±(−2)(

1

4

)

Answer:

No real solutions.

6 0
2 years ago
Please tell me if # 6 and 7 is correct
lesantik [10]
#6 is incorrect
it's 6 7/8
#7 is correct
6 0
3 years ago
What is the answer to (-10) - (-3)?
Zigmanuir [339]
The answer is -7 because when you minus a negative number you add it, and -10 + 3 is -7. I hope this helps!
3 0
3 years ago
3x-12+10=8-2x what does x equal?
nikitadnepr [17]
X=2 because first you have to combine like terms. Than you have to bring the Varible on one side. Finally you solve for the Varible and you get the answer2.
5 0
3 years ago
Read 2 more answers
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