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Calculate the following:
a) Determine the sample size necessary to estimate a population mean to within 1 with a 90% confidence given that the population standard deviation is 10.
b) Suppose that the sample was calculated at 150. Estimate the population mean with 90% confidence.
Briefly describe co relational research. Name a variable from this study and one from the workplace that might prove to provide a co relational relationship
What are the five steps in the hypothesis testing procedure, what does each step represent, what are the advantages and disadvantages of using a hypothesis testing procedure?
How many waiters and busboys should report for work at the start of each time period to minimize the total staff required for one day's operation.
From the calculator manufacturer?s point of view, which type of error would be considered more serious and explain why? From the printed circuit supplier?s point of view, which type of error would be considered more serious and explain why?
If a class of 30 students is chosen at random from the university population, find the mean and variance of the number of male students.
Average (arithmetic mean) of 15 years with a standard deviation of 4 years. How does the relative dispersion in the distribution of salaries compare with that of the lengths of service?
Is spine bone density is normally distributed in young women with a mean of 1.0 g/cm 2 and a standard deviation of .10 g/cm 2 , then how many young women out of 100 would you expect to have bone densities less than .85 g/cm 2 ?
A normal distribution with a mean of 33 oz. and a standard deviation of 0.8 oz. What proportion of packets are underweight (i.e., weigh less than 32 oz.)?
The radar traps at each of the locations L1 L2 L3 L4 are operated 40 30 20 and 30 of the time a person who is speeding on his way to Penn State has a probablities of 2 1 5 and 2 respectivley of passing through these locations what is the probablit..
Determine the probability that mean height of random sample of 100 women is greater than 66 inches?
A marketing firm asked a random set of married and single men as to how much they were willing to spend for a vacation. At *alpha*= .05, is a difference in the two amounts?
Perform a significance test to assess whether there is an association between mortality from cirrhosis of the liver and duration of employment in the group hired after 1945. Report a p-value.
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