1 / 3

Definition

Definition. Sampling distribution of Shape: Normal as long as normal conditions met Center Spread. Definition. Two sample t distribution of Must check Conditions Random Normal Both populations are normal Or both n’s are .30 Independent Check 10% condition Degrees of Freedom

cutler
Télécharger la présentation

Definition

An Image/Link below is provided (as is) to download presentation 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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Definition • Sampling distribution of • Shape: • Normal as long as normal conditions met • Center • Spread

  2. Definition • Two sample t distribution of • Must check Conditions • Random • Normal • Both populations are normal • Or both n’s are .30 • Independent • Check 10% condition • Degrees of Freedom • Use smaller or two values from sizes of samples • Do not use (n-1)+(n-1)

  3. CI Example Do plastic bags from Target or plastic bags from Walmart hold more weight? A group of AP Stats students decided to investigate by filling a random sample of 5 bags from each store with common grocery items until the bags ripped. Then they weighed the contents of the items in each bag to determine its capacity. Here are their results in grams Target: 12572, 13999, 11215, 15447, 10896 Walmart: 9552, 10896, 6983, 8767, 9972 Construct and interpret a 99% CI for the difference in mean capacity of the plastic grocery bags from Target and Walmart Does your interval provide convincing evidence that there is a difference in the mean capacity between the two stores?

More Related