Answer:
(8.213 ; 8.247)
Step-by-step explanation:
Given the data :
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Dia. 8.23 8.16 8.23 8.25 8.26 8.23 8.20 8.26 8.19 8.23 8.20 8.28 8.24 8.25 8.24
Sanple size, n = 15
Sample mean, xbar = Σx / n = 123.45 / 15 = 8.23
The sample standard deviation, s = √(x -xbar)²/n-1
Using calculator :
Sample standard deviation, s = 0.03116
s = 0.031 (3 decimal places)
The 95% confidence interval :
C.I = xbar ± (Tcritical * s/√n)
Tcritical at 95%, df = 15 - 1 = 14
Tcritical = 2.145
C.I = 8.23 ± (2.145 * 0.031/√15)
C.I = 8.23 ± 0.0171689
C.I = (8.213 ; 8.247)
Answer:B
Step-by-step explanation:
This is pretty trival, just plug the numbers in the formula.
Semi perimeter is = (5+6+7)/2 = 9
Area is sqrt((9)(9-7)(9-6)(9-5)= sqrt(3^2 * 2 * 3 * 2^2)
= approximately 14.6969 :) or B
I do belive i did my math correct and I n.v should be the top one
Answer:
10.4
Step-by-step explanation:
If you add all of these up and divide by 5 you get 10.4 which is the average value.
Answer:
A.
Step-by-step explanation:
The domain of a function is the set of -values.