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To test H: u = 20 versus H:u< 20, asimple random sample size of n=18 is obtained from population that is known tobe normally distributed.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
a. If x- =18.3 and s =4.4 compute the test statistic.
T= (round to 2 decimal places as needed).
you wish to test the claim that u gt 11 at a level of significance of ? 0.05 and are given sample statistics n 50
A standard deviation of 1.00 degrees C. Find the probability that a randomly selected thermostat reads greater than -0.74 and draw a sketch of the region.
question consider an investment portfolio of 50000 in stock a and 50000 in stock b. the expected value of a is 9.5
Determine the variance of firm's profit for the month.
among 27 to 32 year old 25 say they have written an editorial letter while under the influence of alcohol. suppose six
At the .05 significance level, is there a difference in the mean number of miles traveled per month between Cincinnati and Pittsburgh employees? Use the five-step hypothesis-testing procedure.
The random variable x is known to be uniformly distributed between 1.0 and 1.5.
A SRS of size 16 drawn from a Normally Distributed population has a mean of 30 and a standard deviation, s, of 5. With 95% confidence, what is the interval that captures the true mean of the population?
A clinical psychologist is interested in the effect that anxiety has on the ability of individuals to learn new material. She is also interested in whether the effect of anxiety depends on the difficulty of the new material.
Home mortgage interest rates for 30-year fixed rate loans vary throughout the country. During the summer 2000, data available from various parts of the country suggested that the standard deviation of the interest rates
find probabilty that the average of those counts is more than 83.0 mosquitoes per square meter. Assume the variable is normally distributed.
suppose that x is a discrete random variable for which ex12 and varx25. compute
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