Answer:
Option a
Step-by-step explanation:
Given two normal distribution samples
I group has 106 as mean and 8.5 as std deviation with sample size = 60
II group has 121 as mean and 6.3 as std deviation with sample size =38
We find mean difference =-15
For margin of error finding, we have to find the combined std error for the difference
Variance of difference = Sum of variances
STd error for difference = 1.50
Hence for 99% margin of error =2.58(1.50)
= 3.87
Answer:
5 inches.
Step-by-step explanation:
We know that the circumference of a circle is equivalent to πr² or πd.
We need to know the radius given the circumference.
C = πr²
75 = 3.14(r^2) (Divide both sides by 3.14)
23.88535031847134 = r^2 (Take the square root of both sides)
r ≈ 4.88726409338
r ≈ 5 inches.
Answer.3*n+2 =3+2 +3n+2Step-by-step explanation:
