7.5.C.17 - Sampling Variability – Exit Ticket
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3 Questions
10
1.
Suppose that you want to estimate the mean time per evening students at your
school spend doing homework. You will do this using a random sample of 30
students.
Suppose that you have a list of all the students at your school. The students
are numbered 1, 2, 3, …. One way to select the random sample of students is to
use the random digit table from today’s class, taking three digits at a time. If
you start at the third digit of row 9, what is the number of the first student
you would include in your sample?
10
2.
Suppose that you want to estimate the mean time per evening students at your
school spend doing homework. You will do this using a random sample of 30
students.
Suppose that you have now selected your random sample and that you have asked
the students how long they spend doing homework each evening. How will you use
these results to estimate the mean time spent doing homework for all students?
10
3.
Suppose that you want to estimate the mean time per evening students at your
school spend doing homework. You will do this using a random sample of 30
students.
Explain what is meant by sampling variability in this context.
From EngageNY.org of the New York State Education Department. Grade 7 Mathematics Module 5, Topic C, Lesson 17. Internet. Available from https://www.engageny.org/resource/grade-7-mathemat...; accessed 8/Apr/2016.