The average spent nationally on Christmas gifts in 2020 was reported to be $650 per person. Below is a random sample of gift givers from Iowa and what they spent in 2020.

MATLAB: An Introduction with Applications
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  1. The average spent nationally on Christmas gifts in 2020 was reported to be $650 per person. Below is a random sample of gift givers from Iowa and what they spent in 2020. 

 

  1. Is there sufficient evidence to conclude that Iowans spend less than the national average?

 

 

 

 

  1. Estimate the average amount spent by Iowans on Christmas gifts in 2020 with a 90%-CI.

 

 

700

450

400

525

550

550

600

575

650

625

500

 

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