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What are the 2 defining characteristics of a data set? explain in sufficient detail. Use ways of describing those characteristics that are commonly seen in statistics and real world application. Examples using made-up data sets might aid your explanation.
Do time series models rely heavily on cause and effect relationships between variables in order to ensure accurate predictions?
The progress report of a research analyst to the supervisor stated: "All the estimated regression coefficients in our model with three predictor variables to predict sales are statistically significant.
An average computer mouse inspector can inspect 50 mice per hour. The 48 computer mice inspectors at a particular factory can only insppect 46 mice per hour with a standard deviation of 10.
What is the di?erence between the binomial and the Poisson distributions and Give some examples of when we can apply the Poisson distribution.
Calculate the value of the chi-square statistic and test whether all regions are statistically the same at 5% and 1% level tests.
Calculate the confidence intervals about a regression line. My data is log transformed and has high R-square value for what is called "power" equation in Excel. My CI's are narrow at the top of the graph and very wide near the bottom.
1. given that z is a standard normal variable pz gt -1.61 is ?2. if x has a normal distribution with mean 100 and
Three different instructional techniques are being considered for training mechanics to perform a difficult emissions-reduction adjustment on fuel-injection engines.
Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades? Explain.
Suppose that a group of 48 students who took the SAT was chosen. If you wanted to calculate a probability for the average SAT score for these 48 students, what is the standard error.
A binomial experiment has 10 trials with a probability of success of 0.62 in each trial. What is the standard deviation of the binomial random variable?
Evaluate the problem in terms of the four characteristics and explain whether you think it does or does not fit the characteristics of a binomial distribution.
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