Chi-Squared hypothesis testing
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- Variance Hypothesis Testing
A sample of 10 dumbbells is weighted. The variance of this sample is 25 grams. With a 90% confidence level what can be said about the following claims:
- Bertie Bott's Every Flavour Beans are on average 2.35 grams. The manufactures (Bertie & Bill Bott) sample 26 beans, and it is found that their standard deviation is 0.043 grams. With a 95% confidence level can Bertie Bott's say that their beans have a standard deviation of less than 0.05 grams?