Sample Size

Comment about today's potato discussion: Do we really need to take a bigger sample if we have stadium full of (randomly mixed up) potatoes compared to when we have "only" a truck full of potatoes? See page 273 for ideas...

homework help

On chapter 11 number five and six. Can anyone help me by explaing how these problems are wrong in that they r not random?

Chapter 12 Reading Question

You should post to BOTH cha.11 and cha.12 reading questions

BIAS: what is it? how can we avoid it? what are some of the common ways it creeps into samples and experiments? can we trust our results if there is a clear bias? does increasing the sample size help?

Reading Question for Chapter 11

Why is important to use randomization when doing an experiment or conducting a survey? How could you tell if someone did NOT randomize properly when looking the data? Try to give specific examples.

I finished the packet

I finished the packet and got 19 of the 25 correct

Aloha!

Have fun on the test, everyone!!!

Answers to Unit 2 Review Packet

Guys, here are the answers, it is up to you to make the answers meaningful to each other. Explain them to each other and ask questions through the blog. By the way, did Ian get his copy?
Disclaimer: I got all the answers the book did, but we still couldbe wrong!

1: D 2: D 3: A 4: in class graph 5: D 6: C 7: B 8: E 9: did class w/ r=.8 10: C 11: D 12: D 13: E 14: A 15: D 16: B 17: E 18: E 19: A
20: D 21: A 22: D 23: B 24: E 25: B

Post back on how did, OR just post back that you've checked answers.

Unit Summary

Below is a list of things you should be able to do or know. The list is not complete, but is a good start. Please post about which ones you "get" and which you "don't get yet". With that info, people can post to each other and help them be successful, also help our review on Thursday. Remember, Monday is a BIG test, don't forget your machine.
*Using machine: make scatterplots, get LSRL, make residual plots
*Analyze residual plot and know what a residual even is
*Interpret slope, y-intercpet, r and r-squared in context of problem
*Use your lin-reg line to make predictions, and the limitations of the predictions
*Know how to analzye/look at computer output
*Are comfortable with re-expressing data
*Are able interpret "strange" points: outliers, influetials and leverage

Re-expressing Data

How comfortable are with notes and the chapter? Of course you should be reading the chapter, but do you get the big idea of making data linear to use regression?

Correlation and Causation

Does a high correlation between two quantitative variables prove that changes in one of the variables causes changes in the other variable? Explain and use a new example if possible.

Homework for STATISTICS OCt. 6th

Chapter 9 #11-13, 17, 19
AND Respond to this question:
How can one point in a scatterplot throw off the entire regression equation, r and r-squared?

See's Candy

BUY SEE'S CNADY FROM MizzJuliah!


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TWO FOR $3.00!

Uniquiness?

AS being me, Josh GOdbout, I have very few Unique attributes. I love sports especially Track and Pole Vaulting. I also love to play the drums on my free time. I also love to socializes with my frineds. This isthree unique things about me. :}

gooodmorning America!! oj simpson is in jail!

Martin's sentences

Im 17 years old. I wrestle for the highschool. I like to sleep alot.

warda is in the house

french toast...

me!

im super cool. too cool fer scool

Chelsea

-I love my job at Ren Faire, because the people there are awesome
-My luck can be amazing sometimes. More often, though, it's horrible
-I have crazy bad insomnia

Stats!

Hello stats peoples! Ain't this funners and fantastical!

jens wonderful world of uniqueness

WELLLLL for starters umm three unique things about myself isss....i love nascar! i like to ride anddddddddddddddddddd i work at faultline yo! ha

3 Things About Adriana

1.My birthday is September 6

2. My Favorite color is purple

3. I love my boyfriend Blake!!!

Here is Dr. A's post

Here's a video about regression.

imm hungryyyy

Intro to Katherine

Hi!
My name is Katherine or Kat it doesnt matter. Im in your class.. You should know that.
I love food including: Ice cream, Chicken Ceaser Salad, and pretty much anything.

Alex's Uniqueness

Okay, My name is Alex which is unique if no one else around me is named Alex/Alexander. Let's see, I'm here wherever that is. And you can also hit me up at...some other place

Rey's Uniqueness

I am the one and only Reynaldo Reyes Jr. I am a Filipino of the San Benito High School community. I work as an admissions associate at the non-profit organization Gilroy Gardens by selling tickets and dealing with guest questions, services, and complaints.

mahalo...

My name is Elvie (LV)..wee.
My favorite color is lavender..(purple) =)
Cakeday=April 4th.

hello

i am 17 i like to eat and sleep

The History of Histograms

In statistics, a histogram is a graphical display of tabulated frequencies, shown as bars. It shows what proportion of cases fall into each of several categories. A histogram differs from a bar chart in that it is the area of the bar that denotes the value, not the height, a crucial distinction when the categories are not of uniform width . The categories are usually specified as non-overlapping intervals of some variable. The categories\bars must be adjacent.

I am going to be turning 18 years old on October 19th. My favorite food is Indian Food and well I just like to eat lots of food! I also like to sleep... when I have time.

Hawks Intro

I play volley ball for SBHS. Iwant to go to BYU for college. I'm 6' 4".

kelsey like wiggas!

yayayyy i love mathhh

Shawns Introduction

I have awesome friends across the country. I haven't grown since about 8th grade. I plan to be an art major.

OH YAaaaaa

Me gusta las comidas de mexicano. Me gusta futbol americano. Me encanta todos los deportes tan poco.

I'm In!

What's up math homies?

I Made it!

i'm here... is amanda there? this is like Myspace!

im onnnnn! STATS ROCKS MY SOCKS!!!!

ha ha

WAHOOO...