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A scatter plot and regression line can be used for all of the following EXCEPT
A) to determine if any (x, y) pairs are outliers.
B) to predict y at a specific value of x..
C) to estimate the average y at a specific value of x.
D) to determine if a change in x causes a change in y.
By using 0.05 level of significance, is there any evidence of difference in mean life of bulbs produced by two kinds of machines?Calculate p-value and interpret its meaning.
If IQ scores on a Stanford-Binet Test are basically distributed with the mean of 100 and a standard deviation of 15, then about how many people in a randomly chosen million would be expected to score at 160 or above?
Explain a Type I error for this situation. Explain a Type II error for this situation.
First part of this theorem allows a problem solver to compute probabilities about sample means regardless of whether a population is normally distributed.
Car Emissions: Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents.
Find the difference between the actual y value and the predicted y value for each individual, square the differences and add the squared values to obtain ss residual.
Calculate the expected value of this undertaking (make sure to take into account the thief's initial wealth).
For a discrete probability function that is given as: a. What is the expected value E(Y)? b. What is the standard deviation (σ) of the random variable Y?
Compute the within group variability. Do you require any post hoc testing? Why or why not? Decribe in detail.
These data are presented below. Should the manager be given an increase in staff? Why or why not? Please show your work.
Describe the circumstances under which you should use ANOVA instead of t tests, and explain why t tests are inappropriate in these circumstances. Find a peer-reviewed article that reflects these circumstances, describe the research conducted (i.e...
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
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