Mathematics, 12.02.2020 03:49 niharikam242
In order to determine the effect companion animals might have on the moods of elderly people living alone experimenters created six groups from a large population of single people over 70 years old. They had three groups: those without pets, those who owned a dog, and those who owned a cat. They randomly selected 50 men from each of those groups and 50 women from each of those groups for a total of 300 participants. Which of the following statements about this study is correct?
a. This study is an experiment, since it was based on a random sample.
b. This study is an observational study, since researchers did not assign the subjects to a gender or pet ownership status.
c. This study is an experiment, since each subject was classified into one of the six possible combinations of pet ownership and gender.
d. This study is a combination of both an experiment and an observational study.
Answers: 2
Mathematics, 21.06.2019 23:40
30 ! the graph shows the number of siblings different students have. select from the drop-down menus to correctly complete the statement.
Answers: 1
Mathematics, 22.06.2019 00:00
Heather is a cashier. she can ring up 1212 customers in 99 minutes. at this rate, how many minutes does it take her to ring up 44 customers?
Answers: 1
In order to determine the effect companion animals might have on the moods of elderly people living...
Mathematics, 11.05.2021 16:30
Mathematics, 11.05.2021 16:30
Mathematics, 11.05.2021 16:30
Mathematics, 11.05.2021 16:30
Mathematics, 11.05.2021 16:30
Mathematics, 11.05.2021 16:30
Social Studies, 11.05.2021 16:30
History, 11.05.2021 16:30
Mathematics, 11.05.2021 16:30
History, 11.05.2021 16:30
Business, 11.05.2021 16:30