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The article "Workers Grow More Dissatisfied" in the San Luis Obispo Tribune (August 22, 2002) states that "a survey of 5000 people found that while most Americans continue to find their jobs interesting, and are even satisfied with their commutes, a bare majority like their jobs." This statement was based on the fact that only 51 percent of those responding to a mail survey indicated that they were satisfied with their jobs. Describe any potential sources of bias that might limit the researcher's ability to draw conclusions about working Americans based on the data collected in this survey.
For a particular population, a sample of n = 9 scores has a standard error of 4. For the same population, a sample of n = 16 scores would have a standard error of ??
assume that the heights of women are normally distributed with mean of 63.6 inches and a standard deviation of 2.5
Users of iPhones were asked to respond to the statement "I do a lot more browsing on the iPhone than I did on my previous mobile phone
What is pooled variance and why is it important? Explain what interval data is and give an example: Write the formula for a problem that has 2 sample populations greater than 30 and the standard deviations are known and equal:
How would a decrease of $1 in the x1 coefficient of the objective function affect the optimal values of the decision variables?
a recent article reported that there are approximately 11 minutes of actual playing time in a typical national football
The following data represent the amount of leakage of a ?uorescent dye from the bloodstream into the eye in patients with abnormal retinas:
Change the degree of the local polynomial in Cleveland's method to 0 (locally constant) using the argument degree (see Comment 8). Using the cars data from Problem 1, how does changing the degree affect the estimates compared to the locally linear..
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
Suppose you were to cut up the directory and pull out one listing at random to contact.
What is the minimum sample size the airline would need to estimate with 95% confidence to obtain a margin of error of +/- 3% for this estimate of the percentage of overweight bags
question a convenience store owner hypothesizes that the median number of snow cones he sells per day is 36. a random
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