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Methods of Data Collection Videos 4 videos

AP Statistics 4.2 Exploring Data
185 Views

AP Statistics 4.2 Exploring Data. The linear correlation coefficient r, takes values in what range?

AP Statistics 4.1 Exploring Data
196 Views

AP Statistics 4.1 Exploring Data. A least-squares regression line is one that fits the data so that...what?

AP Statistics 5.2 Exploring Data
23 Views

AP Statistics 5.2 Exploring Data. Which method would not be a good option?

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AP Statistics 2.5 Statistical Inference 180 Views


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AP Statistics 2.5 Statistical Inference. What is the 98% confidence interval for the slope?

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Transcript

00:00

Thank you We sneak And his you're shmoop du jour

00:06

brought to you by regression You know that feeling you

00:09

get when your mathematical skills suddenly go from i'm pretty

00:12

sure tio if i'm completing a regression analysis you find

00:18

that the least squares regression line is why equals one

00:22

point three Acts plus 32 The output of the analysis

00:25

states that the standard bearer of the coefficient is point

00:28

six three Well knowing this what is the ninety eight

00:31

percent confidence interval for the slope And here the potential

00:34

answers One day you may find yourself running your own

00:41

business looking down at the rest of us from the

00:43

windows of your fifty fourth floor corner office you'll find

00:46

it advantageous to have your staff of accountants use regression

00:50

analysis to identify the factors responsible for your corporation's profits

00:54

Okay so that might be twenty thirty years away but

00:56

well there's no time like the present now that we

00:59

have the least squares regression line and we know the

01:01

standard air of the coefficient is point six three we

01:04

can easily calculate the ninety eight percent confidence interval for

01:08

the slope Well they are absolutely correct We need a

01:12

sample size and we don't have one without that vital

01:15

info We can't calculate the t value because we need

01:19

to know the degrees of freedom You know statistics are

01:22

stubborn that way so you can attempt to make any

01:25

of the answers a through d work but you're going

01:27

to experience an epic fail The answer is e it

01:31

can't be determined that's the right answer in the world

01:34

of statistical inference numbers air like ants they need each 00:01:38.491 --> [endTime] other to solve problems especially on a slope

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