Question

[TI-Nspire]

To buy a thirty-second commercial break during the telecast of Super Bowl XXIX cost approximately $1, 000, 000. Not surprisingly, potential sponsors wanted to know how many people might be watching. In a survey of 1015 potential viewers, 281 said they expected to see less than a quarter of the advertisements aired during the game. Define the relevant parameter and estimate it using a 90% confidence interval.

Please solve using TI n-spire and explain which functions are used.

Answer 1

In TI - n Calculator ,

Press STAT and arrow over to TESTS.

Arrow down to A:1-PropZint. Press ENTER.

Arrow down to x and enter 281.

Arrow down to n and enter 1015.

Arrow down to C-Level and enter 0.90.

Arrow down to Calculate and press ENTER.

The confidence interval is (0.2537, 0.2999).