1) Decide whether these sampling methods produce a simple random sample of students from a class of 30 students. If not, explain why not. a) Select the first six students on the class roll sheet. b) Pick a digit at random and select those students whose phone number ends in that digit. c) If the classroom has six rows of chairs with five seats in each row, choose a row at random and select all students in that row.
1) Decide whether these sampling methods produce a simple random sample of students from
a class of 30 students. If not, explain why not.
a) Select the first six students on the class roll
sheet.
b) Pick a digit at random and select those students whose phone number ends in that digit.
c) If the classroom has six rows of chairs with
five seats in each row, choose a row at random and select all students in that row.
d) If the class consists of 15 males and 15
females, assign the males the numbers from 1 to 15 and the females the numbers from 16
to 30.
Then use a random digit table to select
six numbers from 1 to 30.
Select the students
assigned those numbers for your sample.
e) If the class consists of 15 males and 15
females, assign the males the numbers from
1 to 15 and the females the numbers from 16
to 30.
Then use a random digit table to select
three numbers from 1 to 15 and three numbers from 16 to 30.
Select the students
assigned those numbers for your sample.
f) Randomly choose a letter of the alphabet and
select for the sample those students whose
last name begins with that letter.
If no last
name begins with that letter, randomly
choose another letter of the alphabet.
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