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1. A 2009 sample of New York hotel room prices had an average of $273. Assume this was from a sample of 48 hotels. Assume also that the known standard deviation for the room rates is $72. Construct a 99% confidence interval and report the lower bound for the interval. (Answer to one decimal place and do not include a $ sign).
2. A 2009 sample of New York hotel room prices had an average of $273. Assume this was from a sample of 48 hotels. Assume that the known standard deviation is $72. Construct a 99% confidence interval and report the upper bound for the interval. Your number should be larger than for the previous problem. (Answer to one decimal place and do not include a $ sign).
What is the probability that the mean life-span of a sample of 64 randomly selected bulbs will exceed 727 hours?
franks machine shop operates 250 days per year. frank sells 5000 units per year of his most popular item a specialty
Imagine you are a manager at a major bottling company. Customers have begun to complain that the bottles of the brand of soda produced in your company contain less than the advertised sixteen (16) ounces of product.
let x be a random variable that represents the ph of arterial plasma. for healthy adults the mean of the x distribution
Let X1, ..., Xn be a random sample from a two-parameter exponential distribution, Xi ~ EXP (theta, eta). (a) Assuming it is known that eta = 150, find a pivotal quantity for the parameter theta based on the sufficient statistic.
This exercise is a "what if analysis" designed to determine what happens to the test statistics and interval estimates when elements of the statistical inference change.
an insurance company estimates 45 percent of its claims have errors. the insurance company wants to estimate with 95
The heights of 10 sixth graders are listed in inches: {54, 62, 54, 57, 60, 61, 53, 63, 59, 56}. Find the mean, median, mode, sample variance, and range.
An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula.
For a constant matrix A and a Random vector z, E(Az)=AE(z), var (Az)=A var(z) AT under the Gauss-Markov conditions, determine the mean vector and the variance-co-variance matrix for the vector y-bar?( in terms of X, β, σ2)
a box contains one twenty-dollar bill and four one-dollar bills. two bills are randomly chosen one at a time without
What is the 95% confidence interval estimate for the difference between the mean reflectivity reading for Paint A and Paint B? Please complete the blank: "we can be 95% confident that the true difference between the actual means is?
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