Step-by-step explanation:
x2-x-12<0
x2-x<12
x=12
Answer:
The critical value is T = 3.143.
Step-by-step explanation:
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 = 7 - 1 = 6
98% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 6 degrees of freedom(y-axis) and a confidence level of
. So we have T = 3.143.
The critical value is T = 3.143.
Answer:
20
Step-by-step explanation:
x - 9 = 11
+9 +9
x = 20