19
Example
Use the TI-
30X Plus MathPrint™ to find the exact value of
5π
sin
4
.
Keystrokes and solution
:
The angle mode is
RAD
.
Press
f
k
and enter
5
.
Press
*
d
]
and enter
4
.
Press
>
)
n
.
5π
2
sin
4
2
= −
.
7
Statistics and probability
Press
y
to enter and edit lists (see data editor and list formulas feature).
Press
q
†
to access the
STAT-REG
menu or the
DISTR
menu.
Example
Two companies, A and B, produce packets of chips which are labelled as having a weight of
50
grams. A random sample of
10
packets is taken from each company. Each packet is
weighed and the results, in grams, are as follows.
Company A:
50.0, 50.6, 50.0, 50.4, 49.2, 49.0, 51.4, 50.1, 47.4, 51.9
Company B:
51.0, 50.9, 51.1, 51.5, 51.3, 50.2, 50.6, 50.0, 50.5, 50.9
(a)
For each company’s data, use the TI-30X Plus MathPrint™ to calculate the
(i)
mean weight.
(ii)
five-number summary.
(iii)
interquartile range.
(b)
What, if anything, can be concluded about the manufacturing processes of the two
companies?
Summary of Contents for MathPrint TI-30X Plus
Page 27: ...26 So 32 0 9907 P X 4 dp...
