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How is the t-test for correlated groups and the t-test for single samples similar and dissimilar?
Construct a 99% confidence interval for the difference between the true average boot times of the two types of hard drives. Assume the difference will represent (HDD-SSD) and that the population standard deviations are statistically the same.
The mean top of knee height of a sitting mate is 20.7 in.
A random sample of 80 students is selected for a particular study. What is the probability that the sample proportion (the proportion living in the dormitories) is between 0.30 and 0.50?
What probability distribution does n1 alone have? Specify the values of the sample size index and parameter for that distribution.
Given that alarm has just sounded, find out the probability that real emergency situation exists?
Explain how the binomial distribution could be used in quality control to sample 50 parts in a lot of 500. binomial distrbution
Use a 5% significance level (95% confidence level) to test the claim that the different vehicle categories have the same mean MPG.
at a publishing company the mean age of proofreaders is 36 years old and standard deviation is 4 years. assume the
The tail probabilities given above be affected if the > signs in the inequalities were replaced by ? Explain briefly. Why are the absolute value signs used in the two-tail probability expressions above?
describe some benchmarking performance metrics for the airline
How many observations were in the original data set? In the bottom row of the stem and leaf display identify the stem the leaves and the numbers in the original data set represented by this stem and its leaves.
Sketch density curves that might explain distributions with fallowing shapes: symmetric, but with two peaks( i.e., two strong clusters of observations)
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