Amanda forgot to move the decimal point one place to the left
11.2 / 14 = 0.8
No, the serum is not effective because the p-value for the hypothesis test is greater than the level of significance, and the null hypothesis that the means of the two populations are equal is not rejected.
We are given the hypothesis as:
H₀: μ₁ − μ₂ = 0
H₁: μ₁ − μ₂ ≠ 0 where,
H₀ = the null hypothesis,
H₁ = the alternative hypothesis.
Calculate the test statistic. The equation is:
t = x₁ - x₂ / √pooled variance(1/n₁ + 1/n₂)
Substituting the values, we get that:
t = 2.86 - 2.075 / 2.81(1/5 + 1/4) = 0.699
We need to find the value of 0.699 from the t lookup table and the two-tailed probability is 0.5071.
Therefore, No, the serum is not effective because the p-value for the hypothesis test is greater than the level of significance, and the null hypothesis that the means of the two populations are equal is not rejected.
Know more about “hypothesis” here: brainly.com/question/11555274
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Multiply 79 x 3.
79y if y =3 then you just need to multiply 79 x y or 79 x 3
Answer:
9
Step-by-step explanation:
Just dont even try with these use a calculator every time. even if you're confident
Here are the original equations:
2x + 2y = 14
x + 2y = 11
We immediately note that these two equations form a system. So, we can use substitution to solve the second equation for x. To do this, all that needs to be done is to subtract 2y from both sides, to get x = 11 - 2y. Next, we substitute the derived expression for x into the first equation to get 2(11-2y) + 2y = 14. We can use the distribute property to get 22 - 4y + 2y = 14. Then, we can combine like terms to get 22 - 2y = 14. After that, we subtract 22 from both sides to get -2y = -8. Finally, we divide -2 from both sides to get y = 4.
Now that we have the value for y, we can substitute our derived value into the second equation, since it will be much faster. After doing this, we get x + 2(4) = 11. We can simplify the left side of the equation and subtract the product from both sides, which gives us x = 4. Therefore, the answer to your query is x = 4, y = 4. Hope this helps and happy Halloween!
