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Announcements for 84 upcoming engineering conferences were randomly picked from a stack of IEEE Spectrum magazines. The mean length of the conferences was 3.94 days, with a standard deviation of 1.28 days. Assume the underlying population is normal.
Define in words the random variable X.
Which distribution should you use for this problem? Why?
Construct a 95% confidence interval for the population mean length of engineering conferences.
-state the confidence interval
-sketch the graph
-calculate the error bound
the probabilities of the independent events a and b are 0.4 and 0.5 respectively. find the following probabilitiesa the
Calculate the probability that theta hat falls within 0.2 of the theta given the parameter'e true value is 3.0. Calculate the probability of the event asked in Part(a) assuming the sample size is 3 instead of 6.
suppose the probability of a customer purchasing 0 1 0r 2 books at a bookstore are 0.3 0.2 and 0.5 respectively. what
1. for a standard normal model find the z-value that is less than the mean and for which 67 of the area under the
You are curious about whether the professors and students at your school are of different political persuasions, so you take a sample of 20 professors and 20 students drawn randomly from each population.
Suppose you take a random sample of 15 bearings and compute xbar = 8.2535. What is the probability that you will see a sample mean greater than xbar?
three balls are randomly chosen without replacement from an urn containing 4 red 3 white and 3 blue balls. suppose that
If one of the Titanic passengers is randomly selected, find the probability of getting a woman or someone who didn't survive the sinking.
The mean number of English courses taken in a two-year time period by male and female college students is believed to be about the same. An experiment is conducted and data are collected from 29 males and 16 females. The males took an average of thre..
A file cabinet manufactor estimates that 5% of it's file cabinets will have drawers that close improperly. Assume a production of 120 cabinets is completed. What is the mean and the standard deviation of this distribution?
Given a level of confidence of 99% and a population standard deviation of 10, what other information is necessary:
How long do you exactly need to complete the other question asked? It is very critical for me.
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