HP 10bII - Weighted Mean

Weighted Mean
The following procedure calculates the weighted mean of data points x4,
X» +++) X, Occurring with weights ур, у...
1. Use and Πto enter x,y pairs. The j-valucs are the weights of
the x-values.
2. Press OG).
Example. A survey of 266 one-bedroom rental apartments reveals that
54 of them rent for $500 per month, 32 for $505, 88 for $510, and 92 for
$516. What is the average monthly rent?
Keys: Display: Description:
0.00 Clears statistics
memory.
OOOMOOH 1.00 Enters first rent and its
weight.
( @(5@(@@( 200 Enters second rent and
its weight.
OOOMOOH 3.00 Enters third rent and
its weight.
GGG» 4.00 Eaters fourth rent and
its weight.
CH 509.44 Calculates weighted
mean.
7: Statistical Calculations 93