Answer:
The correct answer is

Step-by-step explanation:
To solve the question we note that the question involves a test statistic calculation given by
Where
x₁ = Mean of sample 1
x₂ = Mean of sample 2
n₁ = Sample size of sample 1
n₂ = Sample size of sample 2
s₁ = Variance of sample 1
s₂ = Variance of sample 2
s₁ = ∑(x₁ - x₁')²/n₁, s₂ = ∑(x₂ - x₂')²/n₂
The test statistic is a variable that is derived from a given data sample and is applied in hypothesis testing. The test statistic measures the available data against the expected value from the null hypothesis
With the given data, we have

Answer:
The decimal 0.345 expressed as a fraction is 69200 .
Answer:
ITS A PLEASE GIVE ME BRAINLIEST
Step-by-step explanation:
To solve this just put a 1 over the 15. So it would be 12/7 + 15/1 which is 16 5/7.