Directions: Identify the parameters to be tested in the following real- life situations. Express it in notation/symbol form.

1. A study shows that the mean survival rate for a COVID positive patient who was vaccinated is at 95%.

2. Mrs. Garcia claims that the standard deviation of scores of her students in Statistics and Probability test is 3. The standard deviation of score of the 37 randomly selected students is 5.

3. A certain high school needs to have new photocopy machines for faster reproduction of self-learning module. The seller claims that the average price of photocopy machines is Php 40,000. The buyer suspected that the claim is incorrect and found that random sample of 10 similar photocopy machines has the mean price of P36,000.00. At a = 0.05, is there enough evidence to reject the seller's claim?