Question

lesson 1-3 practice c surveys, experiments, and observational studies date 1-14-20 class algebra ii explain whether each situation is an experiment or an observational study. 1. a school guidance counselor wants to know whether students with older siblings who went away to college are more likely to want to go away to college themselves. she interviews students about whether they have older siblings who went away to college and whether they are planning to themselves observational study 2. the manager of a grocery store wants to know if a product’s location in the store affects how well the product sells. he first tracks how many of a certain item sells over a month when the display is located where it always has been. he then moves the display to the front of the store so customers see it when they first enter. he again tracks how many of the items sell over a month and compares the numbers 3. a

Explanation:

Problem 1

In this situation, the guidance counselor is only observing and interviewing students to collect data about their older siblings' college choices and their own plans. There is no manipulation of variables (like assigning students to different groups or changing a factor), so it's an observational study.

The grocery store manager manipulates the location of the product display (changing it from its original spot to the front of the store) and then compares sales. Since there is a deliberate change (manipulation) of a variable (product location) to observe its effect on sales, this is an experiment.

Answer:

Observational Study

Problem 2