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A machine fills containers with a mean weight per container of 16oz. If no more than 5% of the containers are to weigh less than 15.8oz, what must the standard deviation of weights equal?
Bougainvilleas, mean growth rate was 2.23 inches/week and sample standard deviation was 0.77 inches/week. Determine a 90% confidence interval for mean growth rate of all Bougainvilleas.
The student body of a large university comprises 60% female students. Elucidate what is the probability that the students in the sample exactly two are female?
The width of a confidence interval will be:
At the .05 level of significance, can we conclude the Middletown students stayed in their districts less time than the Brockton students? Use the five-step hypothesis testing procedure.
Probability values based on normal distribution - What can you say about the shape of the distribution of sample mean and find the standard error of the distribution of the sample mean?
For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.
A certain airplane has 2 independent alternators to provide electrical power. The probability that a given alternator will fail on a 1 hour flight is 0.02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the othe..
Harry and Melissa Jacobson produce handcrafted furniture in a workshop on their farm. They have obtained a load of 600 board feet of birch from a neighbour and are preparation to produce round kitchen tables and ladder-back chairs during the next ..
What is the mean of this uniform distribution? What is the standard deviation?
If random sample of size n = 16 are selected, can we say anything about the xbar distribution of sample means?
Use the value 20 for the population standard deviation of scores on this subsection.
She asks 10 people how many Standard Deviations songs they know. Her data are:
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