Statistics Target 4: Designing a Random Sample

The following questions refer to the study of the following statistical question: Can DCMS sixth graders or seventh graders jump the farthest?

What is the target population of the study?

• All students at DCMS

• All 6th and 7th graders at DCMS

• All 6th and 7th graders in Kentucky

• All 7th and 8th graders at DCMS

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which method would be the BEST for selecting a random sample from the target population?

• Select Ms. Fuller and Mr. Stone's classes

• Choose one table at seventh grade lunch and one table during sixth grade lunch

• All 6th and 7th grade cheerleaders

• Cut up the entire seventh grade roster and entire sixth grade roster, and use a bucket to draw 15 students from each grade level.

Tags

CCSS.HSS.IC.B.3

What element(s) of the study need to be consistent so that the results are fair and accurate? Choose ALL correct answers.

• Hair color of students

• Shoes or no shoes

• Start location and position

• Same device used for measuring distance of jump (example: yardstick)

Which sample statistic would you calculate and why? Choose two best answers.

• The mean because I can take all students' measurements and find an average that could represent each grade level.

• The mode because students are most likely going to get duplicating measurements (same distances over and over).

• The range because the greater the range, the farther the group jumped as a whole.

• The median because this would provide the central measurement of each grade level and would eliminate any outliers that could alter the results.

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

What would you accept as evidence that either the 6th graders or 7th graders could jump the farthest?

• A one centimeter or more difference

• A six inch or more difference

• A five feet or more difference

• A mile or more difference

Tags

CCSS.7.SP.A.2