Chi-square Day 2 Note: NMSI Saturday Session 8:00-12:15 at VHS!

1 / 7

# Chi-square Day 2 Note: NMSI Saturday Session 8:00-12:15 at VHS! - PowerPoint PPT Presentation

Chi-square Day 2 Note: NMSI Saturday Session 8:00-12:15 at VHS!. Student Edition. Warm-up. Which test would be conducted for the situation below (1-sample z, 1-sample t, 1-proportion z, 2-proportion z, 2-sample t, chi-square)

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' Chi-square Day 2 Note: NMSI Saturday Session 8:00-12:15 at VHS!' - anthea

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

### Chi-square Day 2Note: NMSI Saturday Session 8:00-12:15 at VHS!

Student Edition

Warm-up
• Which test would be conducted for the situation below (1-sample z, 1-sample t, 1-proportion z, 2-proportion z, 2-sample t, chi-square)
• A researcher wishes to determine if a higher proportion of Kindle Fire HDX owners use their devices to read books compared to iPad Air users. In a random sample of 150 Kindle Fire users, 48% use the device to read books. In a random sample of 120 iPad users, 35% use the device to read books. Is there evidence to support the researcher’s claim?
Example 1
• The sales of Small Tablets at Geeks R We is expected to be the following:
• The actual sales were 35 iPad minis, 12 Kindle Fires, 5 Nexus 7s, 10 Notes, and 3 Nook Tablets. Is there evidence that the observed values fit the expectations?
Solution
• Will Post Monday!!
HW 1-Due Tuesday Due to Senior Ball and NMSI SSS
• The accuracy of a census in a city in southern California was questioned by congressional officials. A random sample was used to check the results and the data on the next slide was given to Congress. Test that the Census distribution agrees with the sample distribution.
Practice Due Tuesday (Note: Not Chi-square)
• Microsoft claims in an article that 75% of XBOX Live users buy add-ons for games while only 67% of PSN users buy game add-ons. In a study of 500 randomly selected XBOX Live users, 360 buy add-ons. In the same study, 75 out of 100 randomly selected PSN users bought add-ons Is there significant evidence that the proportion of gamers buying add-ons is greater for XBOX Live than PSN?