I need help pls.. please help me to answer them all correctly for an upvote and positive ratings, thank you so much:)

plsss help meee. im having a hard time answering this module plsss help

NOTE: There is no references in my module maam/sir. so pls do understand. thank you

ACTIVITY SHEET 2 WRITTEN WORK NO. 2 A.ldentil'y the given values in each problem. 1. A librarian of a school claims that all their grade 9 students read an average of 9 storybooks a month with a standard deviation of 2 books. A random sample of 50 grade 9 students read an average of 13 books a month. Use 0.05 level of signicance. 2. The hospital record shows that the mean weight of newly born baby is greater than 7 lbs. A researcher takes a sample of 25 newly born babies and found to have a mean weight of6.97 lies with the standard deviation of 0.77 lbs. Test the claim at 0.05 level of signicance. 3. A barangay captain claims that residents in his barangay have a mean number of less than 3 household pets. To test this claim, 550 residents were randomly selected. it was found that the sample mean is 4 with a standard deviation of 1.1. Activity 2. Ho and H1 State the null and alternative hypothesis in (a) words and in (b) symbols for each of the following. 1. A librarian of a school claims that all their grade 9 students read an average of 9 storybooks a month with a standard deviation of 2 books. A random sample of 50 grade 9 students read an average of 13 books a month. Use 0.05 level of signicance. 2. The hospital record shows that the mean weight of newly born baby is greater than 7 lbs. A researcher takes a sample of 25 newly born babies and found to have a mean weight of 6.97 lbs with the standard deviation of 0.77 lbs. Test the claim at 0.05 level of signicance. 3. A barangay captain claims that: residents in his barangay have a mean number of less than 3 household pets. To test this claim, 550 residents were randomly selected. It was found that the sample mean is 4 with a standard deviation of 1 .1