9.What is the margin of error for a sample size of 348 people?

8.The school counsellor decides to modify their sample. This time they ask the data clerk to print the names by grade. The counsellor cuts the strips so each paper strip contains one student name. The counsellor then places all the freshman names in one pile, all the sophmore names in another pile, all the junior names in a third pile and all the senior names in the final pile. The counsellor then randomly selects 10 names from each pile. This is an example of which sampling method.

7.If the null hypothesis of an experiment is “The true mean weight of the piglets is at least 39lbs” what is the alternate hypothesis?

6.The principal wants to conduct a quick survey. Ne decides to step into 5 senior classrooms during first period and ask all the students in the classroom to take his survey. This is an example of what kind of sampling?

5.If the alternative hypothesis of an experiment is "The true mean height of children is less than 60 inches," what is the null hypothesis?

4.The counsellor gets an alphbetical listing of all the seniors. She counts 30 students and draws a line on the paper. She then counts 30 more and draws another line. She keeps doing this until she has placed all the seniors ino one of the 30 student groups. She then grabs a deck of cards, shuffles them and selects a cord from the deck. The card she selects if the 8 of hearts. So, she goes to her list of seniors and selects the 8th student. Then she selects every 20th student until she reaches the end of the list. She informs the students that they will be the ones taking the survey. What type of smapling does this illustrate?

3.The counsellor finds out the data clerk is too busy working on getting report cards printed to help them create a list of names. Instead, the counsellor decides to stand at the school's main entrance and ask the first 30 students who enter the building to participate in the survey. This is an example of which type os sampling?

2.A High School counsellor wanted to conduct a survey of students in their school. They asked the school's data clerk to print a list of all students. The counsellor cut strips so that each strip contained one student's name. They the randomly selected 25 of the strips to identify the students who would participate in the survey. This is an example of what kind of sampling?

1.Calculate the mean, median, mode, and range of the following data set:

1, 2, 4, 5, 6, 7, 7, 7, 7, 8, 9, 10, 11, 11, 11, 11, 11, 12, 13