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Statistics, Data, and Probability II Videos 30 videos

CAHSEE Math 1.2 Statistics, Data, and Probability II
199 Views

Statistics, Data, and Probability II Drill 1, Problem 2. Based on the chart, which of the following statements is true?

CAHSEE Math 1.3 Statistics, Data, and Probability II
169 Views

CAHSEE Math Statistics, Data, and Probability II: Drill Set 1, Problem 3. Based on the following, which of the following statements is true? 

Statistics, Data, and Probability
181 Views

Statistics, Data, and Probability II: Drill Set 1, Problem 4. Which of the following pie charts correctly represents the data given in the table?

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CAHSEE Math 2.1 Statistics, Data, and Probability II 178 Views


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Statistics, Data, and Probability II Drill 2 Problem 1. Yogi's rate of success increased the most from when to when?

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Transcript

00:03

This question is shmoopier than the average bear…

00:08

Yogi Bear has been tracking his picnic basket-stealing rate of success

00:11

for each of the first six months of the year.

00:14

The following graph shows how Yogi fared in each of those months.

00:18

Yogi’s rate of success increased the most from… when to when?

00:23

And here are the potential answers…

00:27

Ok so this question is asking about relative growth rates and it is asking us to calculate

00:32

from one period to the next.

00:34

Note that the answer set doesn’t even include the first period so we can ignore it.

00:39

Best way to start is to just make a quick table.

00:43

Sit at it, take out our notebook and pen.

00:46

And then make this kind of table:

00:48

Second: 65

00:50

Third: 70

00:51

Fourth: 80

00:52

Fifth: 50

00:53

Sixth: 70 Well just visually we can tell that the steepest

00:57

increase is from 5 to 6 but to be hugely sure we’re right…

01:02

…we can just apply the formula NEW MINUS OLD OVER OLD to each of the choices.

01:08

For A, it looks like this: 70 – 65 over 65 and the growth rate is 5 over 65 or just 7.7%.

01:19

For B, we grow from 70 to 80 or 10 units and

01:22

get 10 over 70 or a rate of 14.3%.

01:28

For answer choice C, we grow from 4 to 5 which

01:31

is actually SHRINKAGE so we can just toss it – no growth.

01:35

Answer D goes from 50 to 70 or a growth amount of 20 – 20 over 50 is 40 per cent which

01:41

just smokes everything else.

01:45

So the answer is D.

01:46

As in… “Darn that Ranger Smith…”

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