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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.
A production engineer monitoring a process that makes magic markers samples 500 markers at random and tests to see how many are defective. He finds 50 defective markers. (a) Estimate the proportion of defectives in the population. (b) Const..
a corporation has 11 manufacturing plants. of these 7 are domestic and 4 are located outside the united states. each
Three areas of southern California are prime candidates for forest fires each dry season. You believe (based on historical evidence) that each of these areas, independently of the others, has a 30% chance of having a major forest fire in the next ..
the frequencies of different blood types of 200 people who volunteered at a plasma center is given in the table.blood
Annual family dental expenses for the families of a random sample of ten employees of a company are given below. You can assume the family dental expenses for the employees of the company are normally distributed.
What is the importance of pretesting questions and instruments? What are risks of not doing this? Provide an example
In business statistics is the most broadly used quantitative method. It is concerned with extracting the???
Find the median and the first and third quartiles for the time it took employees using public transportation. Develop a box plot for the information.
Draw a model of the relation {(-6,-8), (3,-3), (-6,-7), (9,7)}. Is the relation a function? Why or why not? Evaluate the function at the specified values of the independent variable and simplify.
List all corner points and determine which combination of items will produce the maximum profit.
a) How many of this younger age group must we survey in order to estimate the proportion of non-grads to within 6% with 90% confidence? n= __ (Round up to the nearest integer.)
Calculate the correlation coefficient and determine whether it is statistically significant using a two-tailed test at the .05 level.
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