Statistics Type of Studies

Statistic help us to...

• obtain data and then organize and analyse

• obtain data and then organize, summarize, present, analyze, interpret and reach conclusions

• obtain data and then organize, summarize, present and analyze

• plan studies and experiments

__________ is the science of collecting, organizing, analyzing, and interpreting data in order to make decisions.

__________ consists of information coming from observations, measurements, counts, or responses.

A __________ is a subset of a population.

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

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

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

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

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

I want to find out how many people in my school like a certain brand of soda, so I watch what all of my friends drink. This is an example of a(n) _​ (a)   .

• Observational Study

• Double Blind Study

• Experiment

• Randomized Trial