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Professor James believes that students who attends his Statistics class regularly have a higher chance of getting an A in the class. He took attendance for all his classes and discovered that about 88% of statistics students attended class regularly. He also found out that if a student attends class regularly, there is a 38% chance that the student receives an A grade; however, if a student does not attend class on a regular basis, there is only 3% chance of an A grade. If a randomly selected student receives an A grade, what is the probability that the student attended statistics class regularly? Draw a probability tree to solve the problem.
Let the probability of a decreasing employment be 0.6 and the probability of a positive economic trend 0.5. Further, assume that the probability of a decreasing employment given a negative economic trend is 0.7.
What are the ways that IT can help comply with legal requirements and social responsibilities surrounding the sales of alcohol?
A railway has 20 stations. A one-way trip involves travel from any one station to any different station. a) How many different kinds of one-way trip tickets must be printed if each ticket identi?es the departure station and also the destination?
3 voters are randomly selected (with replacement) from a group of 1,500 people. The group is known to be 20% republican. What is the probability that all of them are republicans?
What does this account reveal about the nature of slavery and how slavery affected southern society?
Suppose television advertisers want to know if age plays a role in people's response to a rather unconventional ad that might be aired during the next.
The pain levels of a patient are then recorded. How can I tell if this is an experiment or observational study?
Find the P-value that would be used to determine if the percentage of customers who prefer mint chocolate chip ice has increased at a 5% level of significance.
a certain kind of appliance requires repairs on the average once every 2 years. assuming that the times between
Given all of this information, estimate how likely it is that poll 1 and poll 2 will predict the opposite (Republicans win in stead of Democrats, meaning that Republicans should have at least 51% of the votes in the sample).
What is the difference between an independent variable and a dependent variable?- Distinguish between laboratory and field experiments.
Mention your decision regarding the null hypothesis. If H 0 rejected can we conclude that treatment 2 and treatment 3 differ? Use 95 percent level of confidence.
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