19.8 rounded to 1 s.f. is
20
Answer:
T = 4.541
Step-by-step explanation:
We don't have the standard deviation for the population, so we use the t-distribution.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 4 - 1 = 3
98% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 3 degrees of freedom(y-axis) and a confidence level of
. So we have T = 4.541
Answer:
(2,-4)
Step-by-step explanation:
-4+2=-2
10+-4=10-4=6
Equation is
x-6=8
x=8+6
x=14
X equal to 14