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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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