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1. Below is a normal plot of residuals from a regression. Does the plot indicate any problems with the assumption that the residuals are Normally distributed?
A. There are no problems evident in the plot.B. The residuals show some high outliers.C. The residuals are not Normally distributed.
2. A regression was performed on a data set with 22 data points where we were investigating the relationship between a midterm score and the grade on the final exam. We obtained a correlation of 0.30. The t statistic for determining if the relationship is significant isA. t = 1.48.B. t = 1.41.C. t = 1.60.
3. Confidence intervals for a mean response are narrowest where?A. near the ends of the dataB. near the middle of the dataC. They are the same width throughout a data set.
Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the vari..
Suppose the probability of the worst-case scenario increases Compute the expected value of perfect information
A noted psychic was tested for ESP. The psychic was presented with 400 cards face down and asked to determine if each card was marked with one of four symbols: a star, cross, circle, or square. The psychic was correct in 120 cases. Let p represent..
Compute the variance and standard deviation
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A simple random sample of 1000 Americans found that 61% were satisfied with the service provided by the dealer from which they bought their car.
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