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Is the annual average wage of unmarried people (18 - 30) the same as that of married people (31 - 43)?
Hypothesis Statements:
H0: The mean annual wages of unmarried people (18 - 30) is the same as that of married people (31 - 43)
Ha: The mean annual wages of unmarried people (18 - 30) is different from that of married people (31 - 43).
Let's treat race of offenders as the independent variable and race of victims as the dependent variable. If we first ignore the independent variable and try to predict race of victim, how many errors will we make?
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
Testing for two Proportions - Is the difference between the averages statistically significant?
their average cost was 340.00 with standard deviation of 80.00. Dean of students thinks that costs are greater this semester. Determine the test value for this hypothesis.
he length of time a person spends waiting in a physician's office for an appointment can be a frustrating experience. The results below are the responses of internists from two multispecialty group practices to the following question:
A IRS auditor randomly selects 3 tax returns from 48 returns of which 9 contain errors. What is the probability that she selects none of those containing errors? Round to four decimal places.
The managers in a company's East and West regions were rated on the basis of the company's evaluation system. A researcher wishes to conduct a t-test of means to determine if there is a difference between the East and West regions.
How is this relationship different from the bi-variate relationships?
Fitting a straight line to a set of data yields the following prediction line: i=2+5xi
For each of the following situations, indicate what the general impact on the Type II error probability will be:
How should he go about taking samples to gather data for testing the hypotheses?
Consider the experiment of throwing an ideal die three times(all outcomes are equally likely). Let X and M denote the mean and the median respectively, of the three scores obtained.
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