Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. statistics
  3. standard deviation is a useful concept in performa

Standard deviation is a useful concept in performance management. Let us say that a director in...

80.2K

Verified Solution

Question

Statistics

Standard deviation is a useful concept in performancemanagement. Let us say that a director in a local fire departmentwants to know any variation between the performance of this yearand that of the last year. He draws a sample of 10 response timesof this year ( in minutes): 3.0, 12.0, 7.0, 4.0, 4.0, 6.0, 3.0,9.0, 11.0, and 15.0, comparing them with a sample of 10 responsetimes last year ( in minutes): 8.0, 7.0, 8.0, 6.0, 6.0, 9.0, 7.0,9.0, 8.0, and 6.0.

a. Does he see a performance variation by the mean? ( 10points)

b. Does he see a performance variation by the standarddeviation? If he does, is it performance improvement ordeterioration from the last year? Why? ( 10 points)

Answer & Explanation Solved by verified expert
4.2 Ratings (642 Votes)
Inthe given question at first we calculate the mean and    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Psychology
1.2K views

Mammals in general provide parental care for their young. This seems to imply that parents should...

Physics
1.2K views

37 The amount of heat required to raise the temperature of 1 mole of a...

Physics
1.2K views

Water is moving at through a horizontal hose at a a velocity of 2 m/sec....

Physics
1.2K views

SPECIFIC HEAT CAPACITIES OF GASES When an ideal diatomic gas is heated at constant pressure...

Statistics
1.2K views

6 Stacked StatTutor Continuous probability models

Statistics
1.2K views

1 point A special diet is intended to reduce systolic blood pressure among patients diagnosed...

Calculus
1.2K views

You roll a 6 sided die What is P 3 or divisor of 28 5...

Calculus
1.2K views

Emi computes the mean and variance for the population data set 87 46 90 78...

Accounting
1.2K views

the inspection point. Click the icon to view the flow of production table. What is...

Accounting
1.2K views

Analyzing Cost Behavior Ink Shots, Inc., is a new business located in upstate New York....

Accounting
1.2K views

PT Oase has a bank loan that will mature in the next 6 months. PT...

Accounting
1.2K views

Novak Company has a factory machine with a book value of $168,000 and a remaining...