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

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

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

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

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

Student Edition

- 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?

- 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?

- Will Post Monday!!

- 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.

- 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?