Dispersion or variability in statistical analyses

by | Aug 17, 2021 | Assignment

1. In your own words, define and discuss the importance of measures of dispersion or variability in statistical analyses. How do they differ from measures of central tendency?

2. A researcher wants to know about the primary type of drug used by students on a college campus. Her data is in the table below.Primary Drug Used by Students Drug f Marijuana 1250Cocaine/crack175 Heroin250 Hallucinogens 70 Other 385 a) Calculate the variation ratio for the data above. b) Describe and interpret your findings.

3. Ten rookie police officers started working at the Pine Valley Police Dept in 2005. At that time, they all began with the same salary ($36,000/year). Today, 10 years later, the salaries of those same 10 officers are the following: Police Officer Salaries 10 Years Posthire Officer Salary ($)148,000248,000350,000451,000552,000654,000757,000858,000962,0001069,000

a. Calculate the range, variance, and standard deviation of the data above. Describe the results. b. How would you explain the variation (or difference) in salaries?

We help you get better grades, improve your productivity and get more fun out of college!!

Homework Answers Online

Free title page

Free reference page

Free formatting

Unlimited revisions

WhatsApp chat

How it works – it’s easy


Place your Order

Submit your requirements through our small easy order form. Be sure to include and attach any relevant materials.

Make a payment

The total price of your order is based on the type of assignment, number of pages, academic level and deadline.


Order process

We assign the assignment to the most qualified tutor. When the tutor completes the assignment, it is transferred to one of our professional editors to ensure that the assignment meets all of your requirements.

Once complete, we’ll send your assignment via the email provided on the order form and you’ll be able to download it. 

Achieve academic success with the best online tutors