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1.) The mean number of English courses taken in a two-year time period by male and female college students is believed to be about the same. An experiment is conducted and data are collected from 29 males and 16 females. The males took an average of three English courses with a standard deviation of 0.8. The females took an average of four English courses with a standard deviation of 1.0. Are the means statistically the same? 2.) A student at a four-year college claims that mean enrollment at four-year colleges is higher than at two-year colleges in the United States. Two surveys are conducted. Of the 35 two-year colleges surveyed, the mean enrollment was 5,068 with a standard deviation of 4,777. Of the 35 four-year colleges surveyed, the mean enrollment was 5,466 with a standard deviation of 8,191. I need these to be solved showing all the work, no calculators "These are to be complete Hypothesis test starting with Ho & Ha and ending with a decision based on the rejection region or the p-value." "Find Z (crit) for two tail test withα =.05"
Let X denote the mean of a random sample of size 128
The variance of each of the following sets of scores
Political polls typically sample randomly from the U.S population to investigate the percentage of voters who favor some candidate or issue. The number of people polled is usually on the order of 1000. Suppose that one such poll asks voters how they ..
A statistics professor plans class so carefully that the lengths of his classes are uniformly distributed between 45.0 and 55.0 minutes. find the probability that a given class period runs greater than 50.75 minutes? find the probability of se..
We expect to have a positive relationship between Advertising and Demand.
the following data summarize the results from an independent-measures study comparing three treatment
Adequacy Equity Exportability Neutrality Simplicity What other tax revenue systems could you consider? How do you think they would be better or worse? 2. What role do taxes play in political issues?
What statistical method can you apply using this data?
Calculate the Relative Precision Index in each case and, from the table on the following page, state the relative precision for each group and what remedial action should be taken to bring it back within specification limits?
A recent study examined the association between high blood pressure and increased risk of death from cardiovascular disease. There were 2676 men with low blood pressure and 3338 men with high blood pressure. In the low-blood-pressure group, 21 men di..
The higher the scores on these measures, the higher the anxiety level of the participant.
Find the expected value
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