Answer: observational study
Step-by-step explanation:
Observational study : A study in which an observer analyse one or more characteristics of a population (depends on the objective of the study) by just observing the individuals in a sample of the population, but he / she never influence the variables of interest.
Design experiment : In this experimenter design an experiment with a series of tests to check the change in the dependent variable. Here , the experimenter influences the variables of interest.
Given : A poll is conducted in which 574 high school students are asked about how often they listened to music during the past week.
here , the poll is just observing the interest of students instead of influencing them.
Hence, the study depicts an observational study.
He ran 8 miles per hour.
Multiply his speed by the time he ran to find total distance:
8 mph x 1.5 hours = 12 miles
He ran for 12 miles.
Now Find the distance the bus went:
For time, divide the minutes the bus drove by 60 minutes per hour.
55 miles per hour x 24/60 = 22 miles
The bus went 22 miles.
Total distance = 12 + 22 = 34 miles.
About 1/2 since there is only 2 sides to a coin.
Answer:
Ummm use Microsoft math calculator
Answer:
72 doctors recommended the medicine
Step-by-step explanation:
The question above is interpreted thus.
9 out of 10 implies 9/10. If 80 doctors were surveyed, the number of doctors that recommended the medicine is 9/10 of 80 doctors. Therefore,
Therefore, in a survey where 9 out of 10 doctors recommended a certain medicine; and 80 doctors were surveyed, 72 doctors recommended the medicine.
