Texas Instruments MathPrint TI-30X Plus - Using Screen Capture

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.
5π2
sin
42
=−
.
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?