Statistical Types of Studies

A study is done to see how high soda will erupt when mint candies are dropped into two-liter bottles of soda. You want to compare using one mint candy, five mint candies, and 10 mint candies. You design a cylindrical mechanism, which drops the desired number of mint candies all at once. You have 15 bottles of soda to use. You randomly assign five bottles into which you drop one candy, five into which you drop five candies, and five into which you drop 10 candies. For each bottle, you record the height of the eruption created after the candies are dropped into it.

What type of study is described?

• Survery

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

You want to see if fifth-grade boys or fifth-grade girls are faster at solving Ken-Ken puzzles. You randomly select twenty fifth-grade boys and twenty fifth-grade girls from fifth graders in your school district. You time and record how long it takes each student to solve the same Ken-Ken puzzle correctly.

What type of study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

Linda wanted to know if it is easier for students to memorize a list of common three-letter words (such as fly, pen, and red) than a list of three-letter nonsense words (such as vir, zop, and twq). She randomly selected 𝟐𝟖 students from all tenth graders in her district. She put 𝟏𝟒 blue and 𝟏𝟒 red chips in a jar, and without looking, each student chose a chip. Those with red chips were given the list of common words; those with blue chips were given the list of nonsense words. She gave all students one minute to memorize their lists. After the minute, she collected the lists and asked the students to write down all the words that they could remember. She recorded the number of correct words recalled.

What type of study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

Ken wants to compare how many hours a week that sixth graders spend doing mathematics homework to how many hours a week that eleventh graders spend doing mathematics homework. He randomly selects ten sixth graders and ten eleventh graders and records how many hours each student spent on mathematics homework in a certain week.

What study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

A company develops a new dog food. The company wants to know if dogs would prefer its new food over the competition’s dog food. One hundred dogs, who were food deprived overnight, were given equal amounts of the two dog foods: the new food versus the competitor’s food. The proportion of dogs preferring the new food versus the competitor’s was recorded.

What type of study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.5

A large high school wants to know the proportion of students who currently arrive to school on time. Academy Administrators asked a random sample of 𝟐𝟎𝟎 students about their arrival times.

What type of study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

Researchers want to determine if there is a relationship between whether or not a woman smoked during pregnancy and the birth weight of her baby. Researchers examined records for the past five years at a large hospital.

What type of study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

A teacher collected data from a random sample of 𝟓𝟎 students in a school district to see if there is a relationship between a student's reading score on a standardized reading exam and their shoe size.

• Survey

• Observational study

• Experimental Study

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.ID.B.6

Suppose that in your health class you read two studies on the relationship between eating breakfast and success in school for elementary school children. A student decided to organize a google document that his classmates would take at the start of class on Wednesday, asking them what they ate for breakfast that morning.

What type of study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3

A study was done to answer the question, “What is the effect of different durations of light and dark on the growth of radish seedlings?” Three similar growth chambers (plastic bags) were created in which 𝟑𝟎 seeds randomly chosen from a package were placed in each chamber. One chamber was randomly selected and placed in 𝟐𝟒 hours of light, another for 𝟏𝟐 hours of light and 𝟏𝟐 hours of darkness, and a third for 𝟐𝟒 hours of darkness. After three days, researchers measured and recorded the lengths of radish seedlings for the germinating seeds.

What type of study is described?

• Survey

• Experimental Study

• Observational Study

Tags

CCSS.HSS.IC.B.3