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zloy xaker [14]
2 years ago
14

What LCM of 9 and 21

Mathematics
2 answers:
jeyben [28]2 years ago
5 0

Answer:

63

Step-by-step explanation:

21: 21, 42, 63

9: 9, 18, 27, 36, 45, 54, 63

I am joyous to assist you anytime.

ratelena [41]2 years ago
4 0
The least common multiple of 9 and 21 is 63
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Which two of the following are assumptions made when using a two sample test of means with equal standard deviations?
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When using a two sample test of means with equal standard deviations, then T distribution is the best option for it.

Sample test:

Sample test refers a method of reaching a conclusion to reject or support the claims based on sample data.

Given,

Here we need to identify in which  of the following are assumptions made when using a two sample test of means with equal standard deviations.

While we looking into the options for this one, then we have identified that, the sampling distribution of the difference of means is a T distribution.

So, the populations have equal but unknown standard deviation's.

Therefore, we "pool" the sample standard deviation.

To know more about Sample test here.

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