Answer:
± 1.96 and the same as for a two-tailed z test at a 0.05 level of significance.
Step-by-step explanation:
We are given the following information in the question:
We perform a two-tailed hypothesis at a 0.05 level of significance.
We have to state the critical values for the same.
Z-critical:
T-critical:
The critical value for t depends upon the degree of freedom which is obtained from the sample size.
If n is the sample size, then , n - 1 is the degree of freedom.
which is the same as the z-critical
Answer: B
Step-by-step explanation:
The length of the line segment BC is 31.2 units.
<h2>Given that</h2>
Triangle ABC is shown.
Angle ABC is a right angle.
An altitude is drawn from point B to point D on side AC to form a right angle.
The length of AD is 5 and the length of BD is 12.
<h3>We have to determine</h3>
What is the length of Line segment BC?
<h3>According to the question</h3>
The altitude of the triangle is given by;
Where x is DC and y is 5 units.
Then,
The length DC is.
Squaring on both sides
Considering right triangle BDC, use the Pythagorean theorem to find BC:
Hence, the length of the line segment BC is 31.2 units.
To know more about Pythagoras Theorem click the link given below.
brainly.com/question/26252222
Answer:
D
Step-by-step explanation:
there were three times as many new subscribers in the 20-29 and the 30-39 age groups combined for the chronicle than in the 20-29 age group for the times.
Y+4=13
y=13-4
y=11
3x-1=2x
3x-2x=1
1x=1
x=1
3z=63
z=63/3
z=21
Good luck.