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suppose you want to test the claim that mu!=3.5 with standard deviation unknown. Given a sample size of n = 40 and a level of significance of alpha=.05, when should you reject H0.
What do confidence intervals represent? What is the most controllable method of increasing the precision of or narrowing the confidence interval? What percentage of times will the mean, or population proportion, not be found within the confidence ..
What is their maximum error of the estimated mean quality for a 92% level of confidence and an estimated standard deviation of 8?
Determine the mean and variance for the number of Version 3 that someone would expect to get if they were to purchase 18 of the board games at random.
Suppose the probability that a carton of eggs will contain at least one broken egg is 1/3. use a simulation of 20 trials to find the probability that the next three cartons will contain only unbroken eggs.
A researcher tested the reading ability of two groups of primary care patients. The scores on the test range from 1 to 9 with 9 indicating a high degree of reading ability and 1 very limited reading ability.
What is an example of data that can be transformed from one level of measurement to another, and another example of data that cannot be transformed?
At the 0.05 significance level, can he conclude that number of absences has declined? calculate approximately the p -value.
The sat scores attainted by the students in nyc are approximately normally distributed with a mean of 500 and a standard deviation of 80. Find the percentage of students who score less than 700.
Test the equality of the means of three populations.
How large should n be so that Chebyshev's inequality guarantees that the estimate is within 5 centimeters from h, with probability at least 0.99?
The distribution of lifetimes for a certain type of light bulb is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. Find the 33rd percentile of the distribution of lifetimes.
Determine the probability the transmission will break down between 100,000 and 200,000 miles?
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