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Assume that a random variable, x, is distributed according to a normal distribution with mean 12 and standard deviation 2. Find the z-value if:
a. x = 11.8
b. x = 13.5
Using the .02 level of significance, conduct a five-step hypothesis testing procedure to determine if the new processes significantly reduced the wait time.
Determine mean of distribution shown. Give the mean of following probability distribution?
For such groups of 800, would it be unusual to get 687 consumers who recognize the Dull Computer Company name?
Based on our poll what is the margin of error of the proportion of voters favoring the incumbent?
Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
The estimated salary range is $4,500, the margin of error should be $100 and the desired level of confidence is 95%.
A quality control engineer is interested in the mean length of sheet insulation being cut automatically by machine. The desired length of the insulation is 12 feet. It is known that the standard deviation in the cutting length is 0.15 feet. A sam..
Based on these data, explain whether or not course attendance had any effect on determining of a restaurants violation of health code.
Would you conclude that your data set is approximately normal? If so, what percentage of your data values lie:
Detremine the mean, standard deviation, and variance for this frequency distribution.
Can you explain to me how the null and alternative hypothesis for one-sample testing differs from two-sample testing; and explain how these two hypothesis' are the same. Please provide a numerical example:
Construct a 96 percent confidence interval for the mean weight of all firefighters six months after the exercise rooms were installed.
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