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We wish to estimate the mean weight of machine components of a certain type and require a 93% degree of confidence that the sample mean will be in error by no more than 0.004 g. Find the sample size required. A pilot study showed that the population standard deviation is estimated to be 0.09 g.
The credit score of a 35 year old applying for a mortgage at Ulysses Mortgage Associates is normally distributed with a mean of 600 and a standard deviation of 100.
Find the regression equation and percentage of variance and test whether the equation is significant portion of the variance.
Determine the likelihood of accepting a lot which is 1% defective?
According to the patient's history and physical examination. What are the chances of herniation if the MRI is positive?
If garage is robbed, determine the probability doors were left open?
Using six-step critical value approach, at the 0.05 level of significance, is there evidence that population mean delivery time has been increased below previous population mean value of 25 minutes?
Scores on a test have a mean of 73 and Q3 is 81. The scores have a distribution that is approximately normal. Find P90.
The nation health department has concerns with the chlorine level of 0.4% mg/mL at a local water park raises to unsafe level.
Use Excel and the data to test whether the mean alcohol expenditures for UCM students is equal to that of SBU students using a 1 % level of significance.
Is there evidence of difference in median performance between two methods? (Use α = 0.05.)
In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
Do the data indicate that the sleeping pill is effective at a 1% level of significance?
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