Enhanced 7/8 statistics review

Jake went to the mall to conduct a survey.  He asked everyone that came in his question.

• Census
• Sample

_________ is a sample in which each individual or object in the entire population has an equal chance of being selected.

• Sample

• Population

• Random Sample

• Quartile

A student surveys mathematics teachers to get their opinion on teaching.  What is the sample?

• All teachers in the world.
• All teachers within the school.
• All mathematics  teachers in the school.
• All teachers except mathematics teachers.

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

• to randomly ask 8th grade students who went on a field trip last year
• to randomly choose some 7th grade students to select a location
• to ask all 7th grade teachers and administrators for a location
• to ask the student council to choose a location

A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is not a good sample in this case?

• The sample didn't include students.
• The sample is too small.
• The sample can only be accurate if each teacher is included in the sample

The greater the sample size, the less less sampling variability.

• True

• False

The mean of 20 randomly selected 7th graders describes the ______________________.

• Sample Mean

• Population Mean

• Absolute Deviation

• Mean Absolute Deviation

You want to find out how much time 7th graders spend on homework. The mean time spent on homework for ALL 7th graders describes the ______________________.

• Sample Mean

• Population Mean

• Absolute Deviation

• Mean Absolute Deviation

Find the Mean. 

• 5.8
• 5
• 5.6
• 6

What is the mean of these numbers?
4,5,5,2,3,3,2,8

• 40
• 24
• 4
• 256