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The grades in an exam have a normal distribution with u=75 averages and 0:8 standard deviation. The teacher gives AA to those who score 90 and above. Since 12 students got AA, what is the approximate number of students taking the exam?
Standard deviation is $0.10. At α = 0.01, is there significant difference in price? Determine the 99% confidence interval of the difference in the means.
The US census collects data on time it takes Americans to commute to work, among many other variables. The histogram below shows the distribution
What is the upper bound for the 90% confidence interval for the proportion of water specimens that contain detectable levels of lead
Five-sixths of Jesse Black's inventory was destroyed by ?re. He sold the remaining part, which was slightly damaged, for one-fourth of its value and received $2
Estimate the simple linear regression relationship between market share and product quality rating.
The probability of a high school student in 2001 acknowledging having carried a weapon in the past month was 0.174. For those students who carried a weapon
A survey of 529 citizens found that 311 of them favor a new law. We want to find a 95% confidence interval for the true proportion of citizens who favor the law
A Poisson random variable has a PMF of the form- Find the characteristic function- Find the first three nonzero terms in the Taylor series expansion.
the line tangent to the graph of
In a CRISIL Survey conducted in India in April 2003, laborers were asked, "Are you satisfied with the Foreign Direct Investment (FDI) in the country?"
A random sample of 12 batteries yields x‾ = 34.2 hours and s = 5.9 hours. Give a 95% confidence interval for the average life of a battery.
Does this sample provide evidence that the majority of Americans find gay/lesbian relations "morally acceptable"? Describe how you could generate a single randomization sample in this situation, and identify the statistic that you would calculate ..
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