Please help me IDENTIFY AND CORRECT my wrong answer. Thank you!

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Question 1 A pharmaceutical company claims that only one dose of their Hepatitis B vaccine is potent enough to produce immunity to the virus. Some doctors find this highly improbable because Hepatitis B vaccines take more than one dose. They administered this vaccine to 9 volunteers until the volunteers developed immunity. It took an average of 3 doses with a standard deviation of 1.6 for the volunteers to develop immunity. Find the test statistic and its p - value rounded off to two (2) decimal places. Test Statistic = 3.75 P-Value = 0.00 Question 2 A study shows that the normal time that a customer occupied a table in a fine dining restaurant is 1.2 hours with a standard deviation of 30 minutes. A food entrepreneur wants to find the probability that customers occupying 25 tables would have an average time of less than 1 hour. 2.28%Question 3 Based on the nutrition facts of a famous brand of potato chips. its average sodium content is 85 mg per serving (1 bag) with a standard deviation of 2.2 mg. Sixty - four (64) bags were taken as sample. Assume that the variable is normally distributed. Prompts Submitted Answers What is the mean of the sampling distribution? 85 Find the standard error of the sampling 0-275 distribution of the sample mean. Using the central limit theorem. 0.0018 nd the probability that the average sodium content will be larger than 85.8 mg? Find the range of values where 83-15 the middle 80% of the distribution of sample means will lie (A to B). The value of A Is Following the range of values 85.35 problem (middle 80%). the value of Bis Question 4 Kaye Sanchez is planning to give pairs of slippers to a select number of kids in a certain city for her birthday outreach program. To estimate the mean feet size of the kids, she asked the barangay coordinator to survey the feet sizes of 35 kids in their area and the mean was found to be 8 inches with a standard deviation of 0.59 inches. Find a 95% confidence interval estimate of M. A 8.18 06% a5% a