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Let x1, ..., xn be a random sample from an exponential distribution, X ~ EXP(theta).
a) If x(bar) = 17.9 with n = 50, then find a one-sided lower 95% confidence limit for theta.
b) Find a one-sided lower 95% confidence limit for P(X>t) = exp(-t/theta) where t is an arbitrary known value.
Formulate the hypotheses that can be used to determine whether the mean of all account balances is significantly different from $1,150
If an applicant is randomly selected, find the probability of a rating that is between 200 and 275.
Find the probability using the Poisson distribution.
Set up a hypothesis test. Is Charmers' truthful? Describe by working through hypothesis test.
what is the required sample size is the error is to be less than 1/2 hour with a 95% level of confidence?
On average a certain intersection results in 3 traffic accidents per month. What is the probability that for any given month at this intersection
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
A case-control study of relationship between liver cirrhosis among both non alcoholics and alcoholics. Describe whether smoking is confounder.
The following data provided by a coffee company are the roast time in minutes for five batches of coffee (x) and the resulting shrinkage in percent of the coffee weight(y).
The sales manager had predicted, before the business started, that year 1's sales would be 410 air conditioners. Using exponential smoothing with a weight of alpha = 0.30, develop forecasts for years 2 through 6.
The trail was repeated 54 times with 22 correct identifications and 32 wrong identification.
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