Answer:
The correct option is;
D) Observational study
Explanation:
In an observational study, the researcher observes, notes and record the an occurrence of events which are due to the existence of a condition, test, risk factor, such that the experimental units are apparently out of the control of the researcher, or there are no researcher intervention in the study, due to either physical constraint or laid down ethics.
In the question, the researcher observes to determine the the number of people that run a light through pre recorded traffic video providing a physical restraint which makes it an observational study.
As the standard deviation falls, so does the precision. How exact and close a set's measurements are is shown by its standard deviation.
The precision increases as the standard deviation decreases. As precision rises, the standard deviation falls. The accuracy of a measurement refers to how closely it approximates the true value. Standard deviation and accuracy are unrelated. It is possible to compare two normal distributions by using a standard normal distribution as an intermediate. The best strategy is to finish the therapy in 34 minutes. It is important to compare two normal distributions. We can convert them into a typical normal distribution in order to compare them. The probability that a time period of 34 minutes or less will be achieved using strategy A or B will then be determined by extracting the p-value for 34 minutes (converted to the value of a standard normal variate).
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Based on the information given regarding the advertising firm, it can be noted that the firm is at step 4 of the data analysis process.
<h3>
What is data analysis?</h3>
Data analysis simply means the collection and analysis of data in order to reach a particular conclusion or get certain information.
In this case, since the advertising firm has used insights from its analytics team to create a strategy for improving sales. This is the 4th step which is known as "analyze the data".
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Okay so basically you have to add 4 to 7 and then divide it by2
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