Astudy was conducted on the life of Duracell batteries and on the life of Energizer batteries. The study found that a sample of 10 Duracell batteries had a mean life in hours of 26.2 with a standard de viation of 4.1 hours and a range of 24 hours. The results for a sample of 10 Energizer batteries were as follows (in hours):

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
11:36 AM Thu Feb 3
A 56%
K Chapter 3 Averages and Variation Assignment
Home
Insert
Draw
Layout
Review
View
Garamond
12
В I
aA
A
1. Astudy was conducted on the life of Duracell batteries and on the life of Energizer
batteries. The study found that a sample of 10 Duracell batteries had a mean life in
hours of 26.2 with a standard de viation of 4.1 hours and a range of 24 hours. The
re sults for a sample of 10 Energizer batteries were as follows (in hours):
15
18
19
23
25
25
28
30
34
38
(a) Find the mean, median and mode for the Energizer batteries.
med = 25 mean = 26.5 made = 25
(b) Find the variance and standard de via tion for the Energizer sample.
(c) Find the range for the Energizer sample.
(d) Which batteries have a more uniform life in hours? Why?
2. Arandom sample of receipts for individuals eating at the Terrace Restaurant showed
x = $10.39 with sample standard deviation s =$2.15.
Use Chebyshev's The orem to find the smallest interval centered on the mean in
which we can expect at le ast 88.9%of the data to fall.
Okay
I'm
B I U
3.
5
8
tab
Q
E
Y
P
delete
%23
&
caps lock
A
D
F
H
J
K
return
?
shift
X
C
V
B
N
shift
.?123
.?123
# S
Transcribed Image Text:11:36 AM Thu Feb 3 A 56% K Chapter 3 Averages and Variation Assignment Home Insert Draw Layout Review View Garamond 12 В I aA A 1. Astudy was conducted on the life of Duracell batteries and on the life of Energizer batteries. The study found that a sample of 10 Duracell batteries had a mean life in hours of 26.2 with a standard de viation of 4.1 hours and a range of 24 hours. The re sults for a sample of 10 Energizer batteries were as follows (in hours): 15 18 19 23 25 25 28 30 34 38 (a) Find the mean, median and mode for the Energizer batteries. med = 25 mean = 26.5 made = 25 (b) Find the variance and standard de via tion for the Energizer sample. (c) Find the range for the Energizer sample. (d) Which batteries have a more uniform life in hours? Why? 2. Arandom sample of receipts for individuals eating at the Terrace Restaurant showed x = $10.39 with sample standard deviation s =$2.15. Use Chebyshev's The orem to find the smallest interval centered on the mean in which we can expect at le ast 88.9%of the data to fall. Okay I'm B I U 3. 5 8 tab Q E Y P delete %23 & caps lock A D F H J K return ? shift X C V B N shift .?123 .?123 # S
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps with 4 images

Blurred answer
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman