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Data Session 9, Part C: Investigating Variation in Estimates
 
Session 9 Part A Part B Part C Part D Homework
 
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Session 9, Part C:
Investigating Variation in Estimates

In This Part: Using a Stem and Leaf Plot | Judging the Quality of Estimates | Intervals
Describing Intervals | Probabilities

The six worst estimates are shown in pink on the stem and leaf plot:

These six estimates are the most different from 500. Specifically, they differ from 500 by more than 100; they are either less than 400 or greater than 600.

The other 94 estimates differ from 500 by 100 or less. These 94 estimates fall between 400 and 600, inclusive.

We'll refer to these inclusive ranges of values as intervals, and use such intervals to classify the estimates:

 

Ninety-four of 100 (94/100) estimates fall between 400 and 600 (inclusive).

 

Six of 100 (6/100) estimates fall outside of this interval.


 

Problem C3

Solution  

a. 

What proportion of the estimates are 75 or fewer penguins away from the actual value?

b. 

What proportion of the estimates are more than 75 penguins away from the actual value?


 

Problem C4

Solution  

Use this stem and leaf plot to complete the table below:

Interval (inclusive)

Proportion of Estimates in Interval

Proportion of Estimates Not in Interval

350-650

375-625

400-600

94/100

6/100

425-575

84/100

16/100

450-550

475-525

show answers

 

Interval (inclusive)

Proportion of Estimates in Interval

Proportion of Estimates Not in Interval

350 - 650

100/100

0/100

375 - 625

98/100

2/100

400 - 600

94/100

6/100

425 - 575

84/100

16/100

450 - 550

69/100

31/100

475 - 525

37/100

63/100

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Next > Part C (Continued): Describing Intervals

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