HP 10B - Manual (Page 97)

im 3.357.38
3.783.25
Estimalcs sales if 7
minutes of advertising
were purchased.
Estimates sales if 8
minutes were purchased.
How many minutes of advertising should Ali’s buy to attain sales of
$3,000?
3000 |[^
6.16
Estimates minutes of
advertising required for
$3,000 in sales.
Weighted Mean
The following procedure calculates the weighted mean of data points.v¡,
^ 2 ,.. -tXn occurring with weights >» 1 ,^ 2 »* ••>yn-
1. Use IINPUTI and [|+] to enter pairs. Thcy-valucs arc the weights
of the.r-values.
2. Press Bl.rw!.
Example.
A survey of 266 one*bedroom rental apartments reveals that
54 of them rent for $20() per month, 32 for $205,88 for $210, and 92 for
$216. What is the average monthly rent?
Keys:
■icQ]
210 Düüüfl
|[|^
Display:
54 f?Tl
0.00
1.00
32 gT] 2.00
88(13 3.00
92 g3 4.00
209.44
Description:
Clears statistics memory.
Enters first rent and its
weight,
EiUer.s second rent and
its weight.
Enters third rent and its
weight.
Enters fourth rent and its
weight.
Calculates weighted
mean.
94 7: Statistical Catculatlona