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Recent Data Science graduates make $115,000 per year on average with a standard deviation of $20,000. A random sample collected data from 300 graduates in Silicon Valley and found an average salary of $119,000. If we wanted to estimate μ with 99% confidence interval with a margin of error of 2000, how large a sample would we have needed?
Describe the individual probability laws of the random variables Y1, Y2, and Y3, in which Y1 = X1 + X2 + X3, Y2 = maximum (X1, X2, X3), and Y3 = minimum
Interpret the standard error of the estimate? What information does this value provide to the researcher?
We are 95% confident that the populations mean costs of patients' medical charges for an appendectomy through Blue Star Insurance range.
What is the probability that the jelly beans in his hand are all the same color (all red or all green)?
researchers were interested in the relationship between age and brain activity. they collected data on 20 subjects
Create a correlation table for the variables in our data set and Perform a regression analysis using compa as the dependent variable and the same independent variables
urn 1 has 5 red and 7 blue balls and urn 2 has 6 red and12 blue balls. pick 3 uniformly and randomly from each of the 2
Scientist decided to do a study on the population growth of rabbits. Inside a controlled environment, 1000 rabbits were placed - how many rabbits would be there
Weighted alpha is a measure of risk-adjusted performance of stocks over a period of a year. A high positive weighted alpha signifies a stock whose price.
Find 95% confidence intervals for the average call times and back injuries in each year. What conclusions would you reach based on your results?
Who were the main protagonists in Miguel de Cervantes' Don Quixote? What do these characters reveal about Spanish society at large?
Compare the flows in the three lanes by making parallel boxplots. Which lane typically serves the most traffic? Examine the relationships of the flows in the three lanes by making scatterplots. Can you explain the patterns you see
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