Question

determine if the following scenario is best described as an observational study, survey, or experiment. a math teacher announces a study session to be held the day before a test. the teacher makes note of the students who attend the session then compares scores of students who attended to those who did not. observational study survey experimental study question #11 which term describes the variability of the data in a data set? median standard deviation mode mean

Explanation:

1. For the first question: The teacher is simply observing and comparing existing groups (students who attended and those who didn't) without imposing any treatment. In an observational study, researchers observe and measure characteristics of interest without attempting to influence the subjects. A survey involves collecting data by asking questions, and an experimental study involves manipulating a variable. So this is an observational study.
2. For the second question: The median is the middle - value of a data set when ordered. The mode is the most frequently occurring value. The mean is the sum of all values divided by the number of values. Standard deviation measures how spread out the data is from the mean, which describes the variability of the data in a data set.

Answer:

1. Observational Study
2. Standard deviation