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Heights of women have a bell-shaped distribution with a mean of 161cm and standard deviation of 5cm.
a) Using the empirical rule, what is the approximate percentage of women between 156cm and 166cm?b) Using Chebyshev's Theorem, at least what percentage of women are between 149cm and 173cm?
The remaining 5 were not given the overview. Here are the scores for students in each group:
Your task is to interview a representative sample of attendees for the large concert venue where you work. The new season includes 200 live concerts featuring all types of musicians and musical groups.
He wants to be 95% confident that his estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within $200?
To estimate the true proportion of students who abstain from alcohol at LBCC, you will need to take a simple random sample.
What is the probability that the sample will have between 50% and 60% of the identifications correct? What is the probability that the sample percentage of correct identifications is greater than 65%?
This semester a sample of 55 students revealed an average cost of books of $415 per student. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
In a binomial distribution n = 8 and π = 0.2. Determine the probabilities of the following events.
Construction of confidence interval for difference between first and second sample mean revealed interval to be 10 plus or minus 12. We conclude.
A certain component is critical to the operation of medical device and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of these components must..
Variance of 4.2 and mean of 23.2 were calculated. Find out 95% confidence interval on mean and standard deviation. Describe any potential problems with this analysis.
Determine fraction of employees cost between $1,500 and $2,000 per year?
What are the mean and the standard deviation of the number of firms that purchase a Unix machine from Sun Microsystems?
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