Mathematics, 21.11.2020 06:40 onepunchman20
A researcher considers two methods for collecting data to determine if store-brand laundry detergents work as well as name-brand detergents.
Method 1: The researcher surveys shoppers as they enter a grocery store. The shoppers are asked which type of detergent they use and then rate the cleanliness of their laundry on a scale from 1 to 10 (with 10 being the cleanest). The ratings of the name-brand detergents are compared to the ratings of the store-brand detergent.
Method 2: The researcher creates 10 loads of soiled fabrics and washes 5 of the loads with name-brand detergent and the other 5 with store-brand detergent. Volunteers are asked to assess the cleanliness of the fabrics using a scale from 1 to 10 (with 10 being the cleanest), and the ratings of the name-brand detergents are compared to the ratings of the store-brand detergent.
Which method describes an observational study?
Method 2 is an observational study because volunteers assess the fabrics.
Method 1 is an observational study because many people can be surveyed.
Method 1 is an observational study because no attempt is made to influence results.
Both methods are observational studies because information on both types of detergent can be collected.
Answers: 1
Mathematics, 21.06.2019 15:00
What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer
Answers: 1
A researcher considers two methods for collecting data to determine if store-brand laundry detergent...
English, 17.10.2021 14:20
English, 17.10.2021 14:20
English, 17.10.2021 14:20
History, 17.10.2021 14:20
Mathematics, 17.10.2021 14:20
Mathematics, 17.10.2021 14:20
History, 17.10.2021 14:20
History, 17.10.2021 14:20
Mathematics, 17.10.2021 14:20
English, 17.10.2021 14:20
English, 17.10.2021 14:20
Mathematics, 17.10.2021 14:20
Law, 17.10.2021 14:30
Spanish, 17.10.2021 14:30