sorry cant help.............................................
3x+4y=23
2y-x= -19/ multiply -2
4y + 3x = 23
-4y - 2x = 38
_______________
X = 61
2y - x = -19
2y - 61 = -19
2y = 61 -19
2y = 42
Y = 21
Answer:
I used the function 1-proportion z-interval on the calculator, where I inputted
- Successes(x) = 64
- Sample size(n) = 593
- Confidence Level(C level) = 0.99
It would result in zInterval_1Prop 64,593,0.99: stat.results, where the values are shown below as:
- Lower bound (CLower) = 0.075105
- Upper bound (CUpper) = 0.140747
- test statistic (p^) = 0.107926
- Margin of error (ME) = 0.032821
Therefore, the 99% confidence interval would be around 0.11 ± 0.03 or range from 0.08 to 0.14.
<em><u>Note: not sure if this is correct</u></em><em> O_o</em>
According to the research, Dr. Smithe should use naturalistic observation to investigate aggressive preschoolers.
<h3>What are naturalistic observations?</h3>
It is a method used in research and whose basis is to observe the subjects in the place where they live, without the researcher being disturbed in the least.
This allows detailing the behavior of the subjects that we record is what, in fact, the behavior that should happen in their habitat, under those conditions, obtaining real results, without any type of alteration.
Therefore, we can conclude that according to the research, Dr. Smithe should use naturalistic observation to investigate aggressive preschoolers.
Learn more about naturalistic observation here: brainly.com/question/8187021
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