Texas Instruments TI-73 EXPLORER Benutzerhandbuch

Chapter 7: Statistical Analyses     

7307ENG.DOC   CH 7, Statistical Analyses, English   Julie Hewlett   Revised: 07/29/98 12:07 PM   Printed: 05/19/99

9:00 AM   Page 131 of 22

2. Return to the Home screen,

and calculate the average of

the test scores.

- l :
- v " "

- v

b ¡ - v

b E b

 

stdDev(   -

 

  v

 

  "

 

  "

 

 returns the standard deviation of list. If a second list,

freq, is specified, it is interpreted as the frequency of the

elements in the first list. list and freq must have the same

number of elements.

list,freq[,type]

type=

 (population standard deviation) or 

 (sample

population deviation). If type is not specified, the calculator

returns sample population deviation.

Find the population standard

deviation of 

¨

(from the

previous example). Use 

¨

 as

your freq.

- v " "

- v

b

¡ - v

b ¡

E b

³

Solution

David's final course

average is 80.25.