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30,000 people participated in an online poll on cnn.com conducted in April 2012 asking "Have you ever driven with a pet on your lap?" 34% of the participants answered yes and 66% answered no.
(a) Can we conclude that 34% of all drivers have driven with a pet on their lap?
(b) Explain why it is not appropriate to generalize these results to all drivers, or even to all drivers who visit cnn.com. What is the problem with this method of data collection?
(c) Is the variable in this study quantitative or categorical?
The company may test the potential of the rural market for a cost of $25,000. The test has a 90% reliability of correctly detecting the state of nature. Construct the decision tree and determine the optimal decision.
The breaking strengths for 1-foot-square samples of a particular synthetic fabric are approximately normally distributed with a mean of 2,250 pounds per square inch (psi) and a standard deviation of 10.2 psi. Find the probability of selecting a 1..
Show that X\Y has the same cardinality as X, assuming that N has smaller cardinality than X \Y (which cannot be proved in general without the axiom of choice, to be treated in §1.5). Hint: Let B be a countably infinite subset of X \Y . Then B and ..
in a normal distribution of scores four participants obtained the following deviation scores 1 - 2 5 and - 10.a which
tom parks his car at a meter without paying for 1 hour. a parking enforcement officer checks for parking violations an
Calculate then explain/interpret the following 14 tasks/tests using the dependent variable (labeled Y)(Sales) and the independent variables (labeled X1 (Calls), X2 (Time), and X3(Years)). Attached is the excel Spreadsheet with the variables.
according to an irs study it takes a mean time of 330 minutes for taxpayers to prepare copy and electronically transfer
What is the decision rule and What is your decision regarding H0 - The value of the test statistic is . (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
A new company is manufacturing light bulbs. The CEO claims that the average light bulb lasts 260 days. A researcher selects 25 bulbs for testing. The sample bulbs last an average of 250 days with a standard deviation of 20 days.
what is the value of y when x 3 if the equation of the regression line is y 23.1 - 3.8x ?a. 4.73b. 5.29c. 34.5d.
Below is a breakdown of the various expenditure items. Draw an appropriate chart to portray the data and summarize your findings in a brief report.
question suppose a hypothesis states that the mean is exactly 50. if a random sample of 35 items is taken to test this
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