Answer:
Step-by-step explanation:
Hello!
An observational study is one where the investigator has no control or intervenes on it. He just defines the variable of interest and merely collects and documents the information.
An experimental study or experiment is one where the investigator intervenes by defining the variable of interest and artificially manipulates the study factor. It is also one of its characteristics the randomization of cases or subjects in groups (two or more, depending on what is the hypothesis of study).
1)
In the first example, the researcher doesn't control anything about the experiment, he just asks the professional musicians their age.
This is an observational study.
2)
In this second example, there is also no intervention of the researcher, she just asks her employees where they eat their lunch. This example is also an observational study.
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Answer:
A not continueous function
Step-by-step explanation:
has a range
Answer: 
Step-by-step explanation:
Given : Sample space : n= 559
Sample proportion : 
Significance level : 
Critical value : 
Confidence level for population proportion:-
Hence, 95% confidence interval for the percentage of all auto accidents that involve teenage drivers.=
Answer:
The length of the office is 10m
Step-by-step explanation:
120/12= 10m
Answer:
A) Volume of Prism = 48 ft cubed
B) Volume of Pyramid = 16 ft cubed
C) 1/3
This equation is true for all rectangular prisms and rectangular pyramids with the same length, same width, and same height.
Step-by-step explanation:
1) find the volume of the prism
2) volume of a prism = Length x Width x Height
3) 4 x 2 x 6 = 48
4) find the volume of the pyramid
5) volume of a pyramid = Length x Width x Height divided by 3
6) 4 x 2 x 6 = 48 divided by 3 = 16
Hope this helps :)
