A because all of the variables stay constant
Answer:
The 90% confidence interval using Student's t-distribution is (9.22, 11.61).
Step-by-step explanation:
Since we know the sample is not big enough to use a z-distribution, we use student's t-distribution instead.
The formula to calculate the confidence interval is given by:
Where:
is the sample's mean,
is t-score with n-1 degrees of freedom,
is the standard error,
is the sample's size.
This part of the equation is called margin of error:
We know that:
degrees of freedom
Replacing in the formula with the corresponding values we obtain the confidence interval:
![\bar{x}\pm t_{n-1} \times s/\sqrt{n} = 10.41 \pm 1.70 \times 3.71/\sqrt{28} = (9.22, 11.61)](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D%5Cpm%20t_%7Bn-1%7D%20%5Ctimes%20s%2F%5Csqrt%7Bn%7D%20%3D%2010.41%20%5Cpm%201.70%20%5Ctimes%203.71%2F%5Csqrt%7B28%7D%20%3D%20%289.22%2C%2011.61%29)
<span>In the form of a/b = c/d in proportions in math,
the outer terms are called the extremes and the inner terms are called means.
In the given 3/4 = 15/20, the outer terms or the extremes are 3 and 20.</span>
Answer:
9/4
Step-by-step explanation:
goodluk
Answer:
8+24x^8
Step-by-step explanation: