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There are 8146 male employees studied from 1946 to 1981. Comparisons were made for causes of death between mortality rates in these workers and U.S. white male mortality rates from 1950 to 1978. There were 17 deaths from cirrhosis of those hired before 1946 and worked for 10 years or more, compared to 6.3 was expected based on U.S. mortality rates.
Perform a significance test to see if there is a relation between mortality and duration of employment in the group hired AFTER 1945 and report a p-value.
If you use a 0.10 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting a null hypothesis that the population mean is 500 if you use the Z test?
Draw the distribution of the random variable X, representing her time of arrival. (Be sure to include labels and values on the axes.)
Test whether the mean rate is less than 6%. Use P-value approach.
You've administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items.
A random variable X that has pmf given by p(x) = 1/ (n+1) over the range Rx = {0,1,2,...,n} is said to have a discrete uniform distribution. Find the mean and variance of this distribution.
Assuming an exponential service rate μ, set this up as a birth and death process and determine the birth and death rates.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
If a six appears for the third time, the turn of the player ends without moving the token. Determine the sample space of one such throw and determine the probability for each event.
A researcher conducts an experiment comparing two treatment conditions and obtains data with 10 scores for each treatment condition.
A contingency table has 5 rows and 4 columns. How many degrees of freedom are there?
If someone had x=2 job changes, what does the least squares line predict for y, the annual salary?
Find out the decision strategy company must follow, expected value of strategy, and maximum amount the company must pay market research firm for survey results.
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