Step-by-step explanation:
the answer is the number 25
Answer:
Step-by-step explanation:
Hello!
Given the linear regression of Y: "Annual salary" as a function of X: "Mean score on teaching evaluation" of a population of university professors. It is desired to study whether student evaluations are related to salaries.
The population equation line is
E(Y)= β₀ + β₁X
Using the information of a n= 100 sample, the following data was calculated:
R²= 0.23
Coefficient Standard Error
Intercept 25675.5 11393
x 5321 2119
The estimated equation is
^Y= 25675.5 + 5321X
Now if the interest is to test if the teaching evaluation affects the proffesor's annual salary, the hypotheses are:
H₀: β = 0
H₁: β ≠ 0
There are two statistic you can use to make this test, a Student's t or an ANOVA F.
Since you have information about the estimation of β you can calculate the two tailed t test using the formula:
~
= 25.1109
The p-value is two-tailed, and is the probability of getting a value as extreme as the calculated
under the distribution 
p-value < 0.00001
I hope it helps!
Answer:
The measure of arc DC is 
Step-by-step explanation:
we know that
The measure of the inner angle is the semi-sum of the arcs comprising it and its opposite.
![m\angle ATB=\frac{1}{2}[arc\ AB+arc\ DC]](https://tex.z-dn.net/?f=m%5Cangle%20ATB%3D%5Cfrac%7B1%7D%7B2%7D%5Barc%5C%20AB%2Barc%5C%20DC%5D)
substitute the given values
![63\°=\frac{1}{2}[115\°+arc\ DC]](https://tex.z-dn.net/?f=63%5C%C2%B0%3D%5Cfrac%7B1%7D%7B2%7D%5B115%5C%C2%B0%2Barc%5C%20DC%5D)
![126\°=[115\°+arc\ DC]](https://tex.z-dn.net/?f=126%5C%C2%B0%3D%5B115%5C%C2%B0%2Barc%5C%20DC%5D)

Answer:
1726 miles.
Step-by-step explanation: