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1. The value of z score in hypothesis test is influenced by the various factors. Assuming that all other variables are held constant describe how value of z is influenced by each of the following:
a. increasing difference b/w sample mean and orginal population mean.b.increasing population standard deviation.c. increasing number of scores in the sample.
2. If alpha level is changed from a = .05 to a = .01,
a. What occurs to boundaries for the critical regions?b. What occurs to probability of a type I error?
The value of "Z" chosen for constructing (calculating) the confidence interval estimate is determined by
A typical problem statement is correlation research is _____________
A recent study of cardiovascular risk factors reports that 30% of adults meet the criteria of hypertension. if 15 adults are assessed, what is the probabiliy that?
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A person must score in the upper 2% of the population on an IQ test to qualify for member ship in Mensa, the international high-IQ society. If IQ scores are normally distributes with a mean of 100 and a standard deviation of 15, what score must a ..
The display represents Excel output for an ANOVA analysis with σ = 0.05.
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How many departments would they need to survey to achieve this level of accuracy with 95% confidence?
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