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Every 5 years the Conference Board of the Mathematical Sciences surveys college math departments. In 2000 the board reported that 51% of all undergraduates taking Calculus I were in classes that used graphing calculators and 31% were in classes that used computer assignments. Suppose that 16% used both calculators and computers.
a) What percent used neither kind of technology?
b) What percent used calculators but not computers?
c) What percent of the calculator users had computer assignments?
d) Based on this survey, do calculator and computer use appear to be independent events? Explain.
suppose 94 of all students taking a beginning programming course fail to get their first program to run on the first
In fitting the simple linear regression model Yi ~ N (α + β xi, σ 2 ) to the following data:
The front hall display case. The display case is 30 inches tall. Which scale will allow her to make the tallest model that will fit in the display case?
For each of the given, indicate whether the variable is ordinal or not. If the variable is not ordinal, indicate its variable type.
For all questions, clearly explain/show your answers. For the Analysis section, justify your answers with the appropriate graphs, statistics, equations, etc.
Find out whether or not right-hemisphere damage results in significantly reduced performance on spatial skills task. Test with alpha set at .05 with one tail.
1. The counselor calculates the unbiased estimate of the population's variance to be 15. What is the variance of the distribution of means?
a coin is flipped. if a heads is flipped then the coin is flipped 2 more times and the number of heads flipped is noted
When rain is forecast, Mr. Pickwick takes his umbrella. When rain is not forecast, he takes it with probability 1/3. Find the probability that Pickwick has no umbrella, given that it rains.
a study by hewitt associates showed that 79 of companies offer employees flexible scheduling. suppose a researcher
A family wants to fence a rectangular play area alongside the wall of their house. The wall of their house bounds one side of the play area. If they want the play area to be exactly 400ft2, what is the least amount of fencing needed to make this
a) Specify the null and alternate hypotheses for testing that the population correlation is negative. b) Calculate the estimate of the population correlation coefficient between X and Y.
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