The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval 6.95-7.45 7.45-7.95 7.95-8.45 8.45-8.95 8.95-9.45 9.45-9.95 9.95-10.45 hrs a. Find the mean of the battery lives. (Type an integer or a decimal. Round to two decimal places.) b. Find the standard deviation of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) Frequency 2 8 21 39 18 10 2

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
icon
Related questions
Question

Please help me!!  Thank you.

The lives (in hours of continuous use) of 100
randomly selected flashlight batteries are:
Interval
6.95-7.45
7.45-7.95
7.95-8.45
8.45-8.95
8.95-9.45
9.45-9.95
9.95 - 10.45
a. Find the mean of the battery lives. hrs
(Type an integer or a decimal. Round to two decimal places.)
b. Find the standard deviation of the battery lives. hrs
(Type an integer or a decimal. Round to two decimal places.)
Frequency
NONN
2
8
21
39
18
10
2
Transcribed Image Text:The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval 6.95-7.45 7.45-7.95 7.95-8.45 8.45-8.95 8.95-9.45 9.45-9.95 9.95 - 10.45 a. Find the mean of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) b. Find the standard deviation of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) Frequency NONN 2 8 21 39 18 10 2
Expert Solution
steps

Step by step

Solved in 3 steps with 5 images

Blurred answer
Recommended textbooks for you
Advanced Engineering Mathematics
Advanced Engineering Mathematics
Advanced Math
ISBN:
9780470458365
Author:
Erwin Kreyszig
Publisher:
Wiley, John & Sons, Incorporated
Numerical Methods for Engineers
Numerical Methods for Engineers
Advanced Math
ISBN:
9780073397924
Author:
Steven C. Chapra Dr., Raymond P. Canale
Publisher:
McGraw-Hill Education
Introductory Mathematics for Engineering Applicat…
Introductory Mathematics for Engineering Applicat…
Advanced Math
ISBN:
9781118141809
Author:
Nathan Klingbeil
Publisher:
WILEY
Mathematics For Machine Technology
Mathematics For Machine Technology
Advanced Math
ISBN:
9781337798310
Author:
Peterson, John.
Publisher:
Cengage Learning,
Basic Technical Mathematics
Basic Technical Mathematics
Advanced Math
ISBN:
9780134437705
Author:
Washington
Publisher:
PEARSON
Topology
Topology
Advanced Math
ISBN:
9780134689517
Author:
Munkres, James R.
Publisher:
Pearson,