New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

Statistics Week 1

by: Chelsea Notetaker

Statistics Week 1 01:960:401

Chelsea Notetaker
GPA 3.28
View Full Document for 0 Karma

View Full Document


Unlock These Notes for FREE

Enter your email below and we will instantly email you these Notes for Basic Statistics for Research

(Limited time offer)

Unlock Notes

Already have a StudySoup account? Login here

Unlock FREE Class Notes

Enter your email below to receive Basic Statistics for Research notes

Everyone needs better class notes. Enter your email and we will send you notes for this class for free.

Unlock FREE notes

About this Document

First Week of Class notes
Basic Statistics for Research
Michael Miniere
Class Notes




Popular in Basic Statistics for Research

Popular in Statistics

This 3 page Class Notes was uploaded by Chelsea Notetaker on Wednesday August 24, 2016. The Class Notes belongs to 01:960:401 at Rutgers University taught by Michael Miniere in Fall 2016. Since its upload, it has received 73 views. For similar materials see Basic Statistics for Research in Statistics at Rutgers University.

Similar to 01:960:401 at Rutgers


Reviews for Statistics Week 1


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 08/24/16
Statistics 401 Notes Statistics is about collecting data, organizing it, summarization, and then analyzing it. Stats  Collecting o Ex: Surveys  Organization o Grouping the data using graphs or charts  Summarization o Finding the average- median, mean, mode o (center and spread of data- Ex: Standard deviation) o The lesser spread of data (smaller range) = a more reliable source because it is more consistent.  Ex: Data with outcomes of 30-70 (40 range) is MORE reliable than a range from 0-100 (100 range) o Population is the set of all units under study  Population is represented by a sample of these units (random sample).  Analyzing o Based on the sample drawn, you are able to make a conclusion about the population. Variable  Numerical (Quantitative) is when the data is measurable or countable o Ex: weight, age, height  Discrete: specific pattern that has specific values  Continuous: data that varies over an interval (infinite amount of answer between an interval)  Categorical (Qualitative) is when the data is NOT measurable o Ex: race or gender Q: How to tell which is numerical or categorical? A: Finding the average must make sense. Ex: Finding the average weight makes sense because you can have an average weight of 100 lbs and that data can be used. Or, finding the average of house numbers will not help. A person can live in house 12 while another lives in house 15 but finding the average of that does not make sense and isn’t useful. However, find the average of how many people LIVE in a house makes sense. Organizing graphs and charts Categorical Data 1. Pie Chart 2. Bar Graph Series 1 Sales 6 1st Qtr 4 2 0 Series 1 2nd Qtr CategoryCategoryCategoryCategory 1 2 3 4 On the exam, the circle must be relatively as round as you can draw it and the bar graph must have categories evenly spread apart. Numerical Data 18, 19, 19, 19, 21, 21, 22, 23, 23, 23, 24, 24, 24, 24, 24, 25, 25, 26, 26, 26, 28, 28 1. Dot Plot: Make a line graph with values that are in a specific pattern and put an “x” or dot for how many times each number appears. Don’t forget to label axis and give a title for everything. 2. Histogram: Overlapping numbers go to the higher interval. 22 would group with [22-24). Notice the closed bracket. BE SURE TO LABEL AXIS AND TITLE. And there aren’t spaces in between these bars. Age # of people [18-20) 4 8 7 [20-22) 2 6 18-20 5 20-22 [22-24) 4 4 22-24 3 2 24-26 [24-26) 7 1 26-28 [26-28) 5 0 Age Those lines are called tails and if the tails are uneven then it is call skewed. You draw the tails starting at the middle of the tallest bar then draw out following the height of the other bars. Since the tail seems longer towards the left side then it is left skewed. 3. Stem and Leaf Plot Stem Leaf 1 8, 9, 9, 9 2 1, 1, 2, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 6, 6, 6, 8, 8 Stem is the tens place and leaf is the one’s place. Let’s say there weren’t any number in the 20’s you WOULD NOT write the number 2. If there are number in the 30’s then skip 2 and write 3. If there are decimals just write it in the stem part. Ex: 1.5 [1.] would be in the stem part and [5] would be in the leaf part Or you could write “leaf unit = (however many decimal places)” next to leaf and just write the number normally Ex: .45 Stem | Leaf (leaf unit = .01) because 45 x .01 = .45 --------------- 4 | 50 DON’T FORGET TO SEPARATE BY COMMAS Summarizing Measures of center- to know where the balancing point is which can be found with mean (average), median, mode, or mid-range Mean (average): arithmetic mean. Add all of the numbers then divide by how many numbers there are. (can only be one number) Ex: The quiz scores for a class were 50, 86, 97, 76, and 100. What is the average? (50+86+97+76+100)= 409 then divide by 5 because there are 5 test scores. 409/5 = 81.8 Median: middle value of data that increases, in order, from lowest to highest. (only one number) Mode: The number that appears the most. (can be more than one number) µ = population mean x = sample mean N = # units in pop. n = # units in sample


Buy Material

Are you sure you want to buy this material for

0 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Anthony Lee UC Santa Barbara

"I bought an awesome study guide, which helped me get an A in my Math 34B class this quarter!"

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.