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What is the formula for the standard error of the sample distribution when we know the population standard deviation?
Using a level of significance of .10, is there evidence that the dual degree students are receiving lower grades? Fully explain your answer.
Find the average caller "on hold" time if the company maintains that no more than 9% of callers wait more than 6.6 minutes.
Discuss any limitations (inaccurate data; incomplete information; not enough samples for testing)can have an regression analysis.
for a standard normal probability distribution find the percentage of data that area within 1 standard deviation of the
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
it is decided to measure the resistance of sheets of a certain metal at temperatures x of 100k 200k 300k 400k and 500k.
a bank has just made 200 car loans. the banks records indicate that about 7 of their customers make late payments on
Use the Internet to find a website that shows an example or application correlation or regression in the area of your interest or in your profession. Discuss how correlation or regression was used and summarize your finding.
The number of smokers among 120 randomly selected students will vary from group to group. Explain why that number can be described wit a normal model.
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.
1. the diameter of a spindle in a small motor is supposed to be 5 mm. if the spindle is either too small or too large
An international marketer has said, "When political instability increases, the price of quality increases." Think about the potential issues with measurements and data collection. Is this a testable hypothesis?
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