Good day,

I hope you are well.

I would please like some assistance and an explanation on the each of the sub questions on question 3.

I look forward to your reply.

Question 3 1. In a random sample 500 people eating lunch at a cafeteria on various Fridays, it was found that 160 preferred seafood. Find 95% confidence interval for the actual proportion of the people who eat seafood on Fridays at this cafeteria. 2. A random sample of 150 workers showed that 100 are satisfied with their new medical scheme. Construct a 90% confidence interval for the proportion of satisfied workers. 3. The masses of 6 containers of Chow dog food are: 9.5 10.4 9 11 10.5 9.6 Find a 95% confidence interval for the variance mass of all such dog food. Assume an approximate normal distribution. 4. A random sample of 9 cigarettes has an average nicotine content of 2,5 milligram with a standard deviation of 0,8 milligram. Construct an 80% confidence interval for the standard deviation of nicotine content of this brand of cigarettes, assuming the distribution of nicotine contents to be approximately normal