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Question: A sample of n = 500 individuals is asked how many hours they typically spend using a computer in a week. The mean response is x¯ = 8.3 hours, and the standard deviation is s = 7.2 hours. Find values for the interval x¯ = ± 2s, and explain why the result is evidence that the distribution of weekly hours spent using the computer is not bell-shaped.
a researcher reports that when groups of four children are randomly selected from a population of couples meeting
a game at the state fair has a circular target with a radius of 10.7 cm on a square board measuring 30 cm on a side.
Question: What are two potential extraneous variables you need to be careful to consider?
The manager of Sandy Corporation wants to determine whether or not the type of work schedule for her employees has any effect on their productivity. She has selected 15 production employees at random and then randomly assigned 5 employees to each ..
Write a short paragraph explaining to the psychologist what can be concluded from this output (assuming the technical conditions are met).
The geologist's past record indicates that she will predict an earthquake on 95% of the occasions for which an earthquake will occur and no earthquake on 90%.
Compute the mode, median and mean for the college students and compute the mode, median and mean for the parents' data
Discuss what is meant by subjective probability. Provide a business-related example in which subjective probability assessment would likely be used.
How do we go about interpreting the results of various types of statistical tests in health care research?
What might theory-driven hypotheses effect be on research, attempting to use multiple regression techniques for a dissertation
die a is numbered 12345 and 6. die b is numbered 22446 and 6. a fair coin flipped. if it is heads die a is rolled
A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that IQ scores follow a normal distribution. Her random sample of 30 IQ scores has a mean of 102.3 and a standard deviation of 19.5.
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