Question 351:
Asked on August 17, 2008
Tags:
Confidence Intervals
1
Answer:
No answer provided yet.
- Use the confidence interval around a proportion calculator, select a 90% confidence interval and enter 86/773. You should get an interval of between 9.4% to 13.1% (the computational details are on the calculator page.
- Not sure how you check the normality assumption here since the data is a proportion based on the binomial, not normal distribution.
- Don't know what the Very Quick Rule is, never heard of that.
- Not sure what is atypical about this sample, other than over 10% of the kernels were not popped. The other thing to keep in mind is that you are making inferences about all pop-corn kernels based on just one-bag, experimentally it is more sound to sample multiple bags, the compute the confidence interval on the mean number of non-popped kernels.