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A random sample of 81 students at a local university showed that they work an average of 60 hours per month with a standard deviation of 18 hours. Compute a 95% confidence interval for the mean of the population.
when analysis of data reveals differential effects of one factor across levels of another factor what is this
the following eight observations were randomly selected from two populations that were not necessarily normally
A coin is flipped three times.a. Draw a tree diagram that represents all possibleoutcomes. b. Identify all branches that represent the event"exactly one head occurred.
How did you think that your sample would compare to the national mean? This is your hypothesis. State either the alternate or null hypothesis and identify which one you are stating.
ten weeks of data on the commodity futures index are 7.35 7.40 7.55 7.56 7.60 7.52 7.52 7.70 7.62 and 7.55.a construct
In a paragraph explain the differences between the Independent Samples and Paired Samples T-Test. When do you use each? Purpose a research question that could be addressed using each test
city officials in fort lauderdale florida are trying to decide whether to evacuate coastal residents in anticipation of
If the sample standard deviation of the sample was $630 also the sample size was 50. Findout the 90% confidence interval of true mean.
a biology professor claimed that the proportions of grades in his classes are the same. a sample of 100 students showed
A human factors psychologist studied three computer keyboard designs.
State the correct decision and give justification for your decision.
Assume that 6 customers enter store and that these customers make independent purchase decisions. Use binomial formula to compute probability that exactly five customers make purchase.
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