Download presentation

Presentation is loading. Please wait.

1
**AP Statistics: Section 12.1 B**

2
Example: A bank wonders if omitting the annual credit card fee for customers who charge at least $2400 a year would increase the amount that customers charge on its credit cards. The bank makes this offer to a SRS of 200 of its credit card customers. It then compares the amount these customers charged this year to the amount they charged last year. The mean increase is $332 and the standard deviation is $108. a) Is there significant evidence at the 1% level that the mean amount charged increases under the no- fee offer?

3
**Hypothesis: Conditions:**

4
**Calculations: Interpretation:**

5
b) Construct and interpret a 99% confidence interval for the mean amount of the increase omitting the annual credit card fee for customers who charge at least $2400 a year would increase the amount that customers charge on its credit cards.

6
c) Does our work in parts a & b show that omitting the annual credit card fee for customers who charge at least $2400 a year caused an increase the amount that customers charge on its credit cards?

7
**d) Briefly describe the design of an experiment to study the no-fee offer.**

8
The t procedures are robust against non-Normality of the population except when _________ or _________________ are present. (Skewness is more serious than other kinds of non-Normality). Review the guidelines in the box “Using the t-procedures” on page As the sample size increases, the ______ ensures that the distribution of the sample mean becomes more nearly Normal and the t-distribution becomes more accurate for calculating p-values.

9
The power of a statistical test measures its ability to detect deviations from the ____. The power of the one-sample t -test against a specific alternative value of the population mean is the probability that the test will _____________ when the mean has the alternative value.

Similar presentations

OK

AP Statistics Section 11.2 B. A 95% confidence interval captures the true value of in 95% of all samples. If we are 95% confident that the true lies in.

AP Statistics Section 11.2 B. A 95% confidence interval captures the true value of in 95% of all samples. If we are 95% confident that the true lies in.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on diffusion taking place in our daily life Download ppt on pulse code modulation transmitter Ppt on etiquettes Ppt on crafts and industries Ppt on census 2001 Ppt on hard gelatin capsule solubility Ppt on emotional intelligence for students Ppt on non ferrous minerals in water How to run ppt on ipad Ppt on recycling of waste plastics