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You want to be able to state that the population mean is lower than some value with 95% confidence. What t value would be used to find the 95% one-tailed confidence interval for the population mean when n = 12 and the population is known to be normally distributed? Express your answer with 3 places of decimal. Note that confidence intervals are always assumed to be two-tailed unless, as in this case, otherwise specified.
find the value ofnbsptnbspfor the difference between two means based on an assumption of normality and this information
A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 73 and a standard deviation of 8.
For any hypothesis test, if the value of a parameter being tested falls outside the confidence interval for the same level of a, the correct decision is to reject the null hypothesis. Is this True or False?
if an analysis of variance is used for the following data what would be the effect of changing the value of ss1 to
If 45 houses are randomly selected, what is the probability that four of the houses will be burglarized? Is this a binomial experiment? Explain how you know.
car insurance claims are normally distributed with a mean of 2100 and a standard deviation of 100. a new claim comes
Solve the model by using graphical analysis.
Electrical components of a particular type have exponentially distributed lifetimes with mean 48 hours. In one application the component.
Formulate null and alternative hypotheses to test the analyst's claim.
Let X1, ..., Xn be i.i.d. with the Lebesgue p.d.f. ?x?-1I(0,1)(x), where ? > 0 is unknown.
What is wrong with this design? What confounds could be leading to the results of improved memory and problem-solving skills?
in southern california a growing number of persons pursuing a teaching credential are choosing paid internships over
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