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Examine the histogram of the standardized residuals for the regression of annual earning on annual hours worked among Registered Nurses below. Which conclusions can be made about the model using this graphic? (see attached image)!a)I. The standardized residuals are approximately normally distributedb)II. The distribution of standardized residuals is symmetrical (not skewed)c) III. There are many extreme outliers for this regressiond) There is evidence for both statements I and II in the graphice) There is evidence for both statements II and III in the graphicf) There is evidence for all three statements in the graphic
Do you use probability in your profession or real life? You most likely do. For example, chance of rain tomorrow is 27%. We hear similar probabilities in the media all the time.
Suppose that you wish to perform a nonparametric test for a difference among the medians of three or more independent populations. Which of these tests would be appropriate?
A recent census of a small town in Michigan showed that 60% of the residents are male, 20% have college degrees, and 15% are both male and college graduates.
Would it be reasonable to conclude that the population distribution is Poisson with a mean of 2.0?
Calculate a 90% CI for the population proportion of Americans who believe there is intelligent life on other planets.
Which of the following is true about the expected value of perfect information. It is the amount you would pay for any sample study.
A researcher is asked to determine the likelihood that a new medication for arthritis works better than a similar medication that's been around for a decade. How would the researcher approach this assignment?
What is the probability that a cereal would be high calorie, given that is low fiber? In other words, what is P (high calorie, given low fiber)?
Consider a large population of families with three children each. If the genders of children in any family are independent of one another, the number of male children in any family will have a binomial distribution based on three trials.
Is the null hypothesis more likely to be rejected at alpha = 0.01 than alpha = 0.10? As the significance level increases to alpha = 0.10 from alpha = 0.01
Problems on Sampling Variability and Standard Error and Confidence Intervals
A store selling newspapers orders only x=4 of a certain newspaper because the manager does not get many calls for that publication. If the number of requests per day follows a Poisson distribution with mean 3.
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