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Identify the independent and dependent variables in the following descriptions of experiments:
a. Students watched a cartoon either alone or with others and then rated how funny they found the cartoon to be.
b. A comprehension test was given to students after they had studied textbook material either in silence or with the television turned on.
c. Some elementary school teachers were told that a child's parents were college graduates, and other teachers were told that the child's parents had not fi nished high school; they then rated the child's academic potential.
d. Workers at a company were assigned to one of two conditions: One group completed a stress management training program; another group of workers did not participate in the training. The number of sick days taken by these workers was examined for the two subsequent months.
An SRS of 25 faculty members at a large southeastern university found that 10 felt that the university was supportive of female and minority faculty. What is the p-value of your test
The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds. What is the value of the population mea..
Provide a descriptive analysis of the two variables (e.g., mean, standard deviation, minimum and maximum).
a sample of n 9 has a mean of m 72 with ss 162. use the sample to make a point estimate of u and to construct the 90
We have found the density of the sum of two independent U(0,1) variables. Use that result to find the density of the sum of three independent U(0,1) variables.
find the p-value based on a standard normal distribution for the standardized test statistic and provided alternative
The outcomes of the successive trials are assumed to be independent. Find the frequency function for the total number of attempts. What is the probability that player A wins?
A box contains 3 blue marbles and two red marbles. If two marbles are drawn randomly and without replacement, find the probability that (a) at least one of the marbles is blue
Entities arrive at single-server queuing system at average of 4 per hour and server can service average of 5 per hour. Mean in the queue is?
According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly.
Develop a simple linear regression model based on least squares that predicts advertising revenue per page from circulation (i.e., feel free to transform either the predictor or the response variable or both variables). Ensure that you provide jus..
A group of students at a school takes a history test. The distribution is normal with a mean of 25, and a standard deviation of 4. (a) Everyone who scores in the top 30% of the distribution gets a certificate.
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