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Measurements of the diameter of a random sample of 100 ball bearings made by a certain machine during one week showed a mean of 0.944 inch and a standard deviation of 0.052 inch.
a) Find a 90% Confidence interval for the mean diameter of all the ball bearings
b) Find a 95% confidence interval for the mean diameter of all the ball bearings
supposed that battery failure time measured in hours has a probability density function give by fx2x13. compute the
A box contains 5 red marbles and 10 blue marbles. You can take 3 marbles at random, without replacement. What is the probability of winning this game?
Produce a printout of the frequency tables, showing the total of both frequencies.
the manager of an accounting office at a large hospital was interested in studying the problem of errors in the entry
Define Autocorrelation in the following terms. In which type of regression is it likely to occur? What is the negative impact of autocorrelation in a regression?
the average life expectancy in the united states l has been rising steadily over the past few decades as shown in the
Brooke can expect a different grade in each of thecourses, depending on who teaches it next quarter. Determine the best course to take next quarter, using the following criteria Maximax.
Construct a 95% confidence interval for the population standard deviation. Test at the 5% level of significance that whether the variance of length of pipes is significantly different from the standards.
Make up a scatter diagram with 10 dots for each of the following:
in a randomized trial who should be blinded to which treatment group the patient is assigned?1. the patient2. the
according to a survey by topaz enterprises a travel auditing company the average error by travel agents is 128. suppose
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
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