Texas Instruments ti nspire cx - One Sample T-Test Introduction

TI-Inspire manual 27
One sample T-tests
The United States has the highest teen pregnancy rate in the western world, despite the
fact that US teens are not more sexually active than Swedish teens, Canadian teens, or
British teens.
The mean teenage pregnancy rate in the US is 11.85%
The rates for states in the this area
( based on survey of 15-19 year olds)
Arkansas
17.28%
Mississippi
18.75
Louisiana
17.05%
Texas
15.25%
H
O
: There is no significant difference in the pregnancy rate of the states of
Arkansas, Mississippi, Louisiana and Texas compared to the rest of the
nation
H
A:
There is no significant difference in the mean teenage pregnancy rate of
the four states sample and the US average.
Other Alternative hypothesis are of course possible.