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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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20,18,13,17,18 find the mean,median and mode​
Degger [83]
<h3>Answer:</h3>

Mean: 17.2

Median: 18

Mode: 18

<h3>Solution:</h3>

Mean: The sum of all observation divided by several observation

  • 20+18+13+17+18=86
  • 86÷5=
  • 17.2

Median:it is the middlemost observation of data arraged in increasing or decreasing order of values

  • (13,17,18,18,20)
  • (17,18,18)
  • (18)

Mode:it is the value that occurs frequently in a set of data

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Hope it helps

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2 years ago
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Sladkaya [172]

14-5+20÷2∧2+4

exponent first: 14-5+20÷4+4

Divide: 14-5+5+4

Solve left to right: 9+5+4

add all: 14+4 = 18

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nordsb [41]

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Nina [5.8K]

Answer:

a) 231

b) 52.8

Step-by-step explanation:

210*.10 = 21. 21+210 = 231

48*.10=4.8 4.8+48 =52.8

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Answer:

The answer is p+q

Step-by-step explanation:

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