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The Black Death 1346-1353: The Complete History by Ole Benedictow was featured in the New England Journal of Medicine's March 2005 book review. The reviewer criticized the book's claim that the Black Death was the bubonic form of a rodent disease (Y. pestis) spread by fleas. Because the spread of Y. pestis depends on homebound rats, it is known to travel at a rate of only about 8 miles per year, whereas the Black Death "almost equalled that speed per day."9 For each of the two diseases, the speed of spreading corresponds to the slope of the line that relates distance to time, which is not exactly known but could be approximated by experts with interval estimates.
a. According to the critic of the theory that the Black Death and Y. pestis are one and the same, would confidence intervals for those two slopes overlap or not?
b. This problem involves three variables: distance covered, time, and type of disease. Tell whether each is quantitative or categorical, and whether it plays the role of explanatory or response variable.
Starbucks regularly introduces new coffee drinks and attempts to evaluate how these drinks fare by estimating the price its franchises can charge for them and sell enough cups to justify marketing the drink.
Assume that the population average for adults is 6 hours and 57 minutes, or 6.95 hours of sleep per night, with a standard deviation of 2 hours.
This is a simplified inventory problem. Suppose that it costs c dollars to stock an item and that the item sells for s dollars.
Find the 90% confidence interval for the variance and standard deviation for the time it takes a state police inspector to check a truck for safety if a sample of 27 trucks has a standard deviation of 6.8 minutes.
What term is used to describe the fact that productivity increased simply because the subjects knew they were in an experiment?
provide a detail explanation for every case1. there are 6 types of rolls available in a bakery in quantities of dozens
Translate the following statements into symbolic form using capital letters to represent affirmative English statements.- If motion pictures contain subliminal sex messages or if they challenge the traditional family, then conservative politicians ..
"A bin of 50 parts contains 5 that are defective. A sample of 10 parts are selected at random, without replacement. Compute the probability that a sample contains at least four defective parts."
Test the hypothesis that the true Pearson correlation (p) is significantly different from zero. Provide a (p) value (two-tail) n=12. Correlation intake is .448 for the two recording methods.
catco has a new line of kitten starter kits. the basic kit features a sandbox sand scooper three cans of kitten food
The percentage of people who recycle their old phone books is 15.8% on average. If 240 people are randomly selected, what is the probability that more than 20% of them recycle their phone books?
Four predictor variables are being considered for use in a linear regression model. Given the accompanying correlation matrix, does it appear that multicollinearity could be a problem?
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