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Q1) Die with 4 sides {1, 2, 3, 4} is tossed 2 times. Let X equal maximum of two observations and let Y equal minimum. Determine joint pmf of X and Y, and correlation coefficient. Are X and Y independent?
Create three tables: Sample Space for two tosses, table for values of X and Y for each outcome, finally table for pmf.
Q2) National average SAT score is 1025. Nothing is known about distribution of distribution except that standard deviation is 100. If sample of 50 students is randomly chosen, determine the probability that their average SAT score would exceed 1060?
What is the distribution of sample means.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
The probability of the patient being chosen at random as having meningitis as only site of infection is?
In certain normal distribution of scores, mean is 50 and standard deviation is 4. Determine z-score corresponding to a score of 55.
A point estimate for the difference between the mean purchases of the users of the two credit cards is:
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
If the decision in the hypothesis test of population correlation is to reject the null hypothesis, what can we conclude about the population correlation.
Below you are given a partial computer output based on a sample of 21 observations, relating an independent variable (x) and a dependent variable (y).
Find out the Expected value of the perfect information for the given problem. Given the subsiquent cost tree, illustrate what is the expected outcome.
Suppose we wish to predict the crawling age of a particular baby when the average outdoor temperature is 25°F six months after birth.
What's the probability that among three randomly selected high school students
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
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