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Planning and Conducting Experiments Videos 3 videos

AP Statistics 1.1 Sampling and Experimentation
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AP Statistics: Sampling and Experimentation Drill 1, Problem 1. Which of the following statements is true?

AP Statistics 2.4 Statistical Inference
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AP Statistics 2.4 Statistical Inference. Calculate the margin of error.

AP Statistics 1.4 Statistical Inference
172 Views

AP Statistics 1.4 Statistical Inference. What is the 99% confidence interval for the dogs' biscuit consumption?

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AP Statistics 2.4 Statistical Inference 180 Views


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Description:

AP Statistics 2.4 Statistical Inference. Calculate the margin of error.

Language:
English Language

Transcript

00:00

Thank you We sneak In here's your smoke too sure

00:06

brought to you by beehives marge simpson is really wishing

00:10

she would have gone with a different hairstyle way took

00:13

a random sample of bees from a local hive and

00:15

found out that of the three hundred fifty bees polled

00:18

three hundred two of them gather pollen all day Kind

00:22

of makes you wonder what the other forty eight bees

00:24

are doing with their time there Okay so calculate the

00:26

margin of error That would help you determine the ninety

00:29

five percent confidence interval for the proportion of bees that

00:32

collect pollen all day long And here the potential answers

00:35

All right right there those guys Well let's swap answer

00:41

e out of here because we totally have enough information

00:44

to determine the confidence interval i want an answer be

00:47

if you've been paying attention in class by now you've

00:49

memorized your z table for the usual confidence intervals If

00:53

so then one point nine six should look awfully familiar

00:57

Well ninety five percent of the area under a normal

00:59

curve lies roughly within one point Nine six standard deviations

01:03

of the mean that's the number used in formulating a

01:07

ninety five percent confidence interval z values like one point

01:11

nine six or nice tohave and fun to work with

01:13

but they aren't the margin of error So b is

01:16

an incorrect answer Interesting is highly suspect as well if

01:19

you really think about it Point eight six to nine

01:22

is actually the percentage of bees in our high but

01:25

gather pollen all day Three o two out of three

01:27

fifty or busy as bees by the same token point

01:31

one three seven One is the percentage of these who

01:34

you know chill If the queen finds out it'll really

01:37

put her stinger in and not buzz off answer See

01:40

you are a percentage and not the margin of error

01:43

What we're left with using all the other numbers we

01:45

talked about is this equation point zero three six One

01:49

is the margin of error we're searching for So you

01:51

got stung if you answered a and you're looking sweet

01:54

as honey if you chose d remember next time you

01:57

come across a hive you khun b ninety five percent

01:59

certain There are a few bees inside that goofing off

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