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Chapter 7 day 1. BELL RINGER!. Bell Ringer 43:. Didn’t do one Spring 2012 (got back on track from HSAP) Wrote “SKIP 35-43” in BR notebook. Chapter 7 day 2. BELL RINGER!. Bell Ringer 44:. Unoccupied seats on flights cause airlines to lose revenue.

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slide1

Chapter 7 day 1

BELL RINGER!

slide2

Bell Ringer 43:

Didn’t do one Spring 2012 (got back on track from HSAP)

Wrote “SKIP 35-43” in BR notebook

slide3

Chapter 7 day 2

BELL RINGER!

slide4

Bell Ringer 44:

Unoccupied seats on flights cause airlines to lose revenue.

Suppose a large airline wants to estimate its average number

of unoccupied seats per flight over the past year. To

accomplish this, the records of 225 flights are randomly

selected, and the number of unoccupied seats is noted for

each of the sampled flights. The sample mean is 11.6 seats

and the standard deviation is 4.1 seats. Estimate m, the

Mean number of unoccupied seats during the past year,

using a 90% confidence interval.