Answer:
The t distribution is used, because we have the standard deviation for the sample.
Step-by-step explanation:
When to use the z or the t distribution?
When we have the standard deviation for the population, we use the z distribution.
When we have the standard deviation for the sample, we use the t distribution.
In this question:
We have the standard deviation for the sample, which means that the t distribution is used.
A - 2 1/2 = 1 1/2
Solve for A by adding 2 1/2 to both sides:
A = 1 1/2 + 2 1/2
A = 4
The answer is c. A = 4
Check: 4 - 2 1/2 = 1 1/2
A+7=0
A+7-7=0-7
A=-7
B+3=7
B+3-3=7-3
B=4
Answer:
4 : 5
Step-by-step explanation:
18 - 10 = 8 (Bones)
Bones to frisbees
8 : 10
Simplest form which is divided by 2 for each number:
4 : 5
