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In a survey of 100 people who had recently purchased motorcycles, data on the following variables was recorded:
Gender of purchaser
Brand of motorcycle purchased
Number of previous motorcycles owned by purchaser Telephone area code of purchaser
Weight of motorcycle as equipped at purchase
a. Which of these variables are categorical?
b. Which of these variables are discrete numerical?
c. Which type of graphical display would be an appropri- ate choice for summarizing the gender data, a bar chart or a dotplot?
d. Which type of graphical display would be an appropri- ate choice for summarizing the weight data, a bar chart or a dotplot?
Use Are the data statistically significant at the given level of significance? Based on your answers, will you reject or fail to reject the null hypothesis?
the total blood cholesterol concentrations in mgdl are shown below for a random sample of six people. in the table
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a consumer group decides to test the effectiveness of a new organic laundry detergent. they intentionally get grass
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In a 10-μm-long bar of donor-doped silicon, what donor concentration is needed to realize a current density of 2 mA/μm2 in response to an applied voltage of 1 V? (Note: Although the carrier mobilities change with doping concentration, as a first a..
Criminal activity with guns. Will deter criminal use of these weapons? People from entering Canada, how can we stop gun smugglers?
Suppose we ?ip a coin n times and let p denote the probability of heads. Let X be the number of heads. We call X a binomial random variable, which is discussed in the next chapter.
Generate a training sample of size 100 for each class, as well as a test sample of 5,000 per class. (Best to generate the centroids matrices per class once and store them).
What is a test statistic and how is it related to a critical value in hypothesis testing? What is the critical region in hypothesis testing and why is it important?
1. in a recent survey of 4513 college undergraduates 20 reported having fallen asleep in class. to test this
The letters in the word FULL are rearranged at random. What is the probability that it still spells FULL?
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