Texas Instruments TI-30X B 用户手册

2-Var: Data: (45,30); (55,25). Find: xÅ(45)

³ Problem

For his last four tests, Anthony obtained the following scores.

Tests 2 and 4 were given a weight of 0.5, and tests 1 and 3

were given a weight of 1.

Stat Var

2 <

V 2 <

Clear all

data

v v$$$

Data

<45 $ 55 $"30
$25 $

Stat

%t 2

(Your screen may not

show 3:StatVars if you

did not previously perform

a calculation.)
$ $

<######

<45 E <

Test No.

Score

Coefficient

0.5