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Hummingbirds and flowers. Different varieties of the tropical flower Heliconia are fertilized by different species of hummingbirds. Over time, the lengths of the flowers and the form of the hummingbirds' beaks have evolved to match each other. Here are data on the lengths in millimeters of three varieties of these flowers on the island of Dominica:
Make boxplots to compare the three distributions. Report the five-number summaries along with your graph. What are the most important differences among the three varieties of flower?
in 2008 a university in the midwestern united states surveyed its full-time first-year students after they completed
the time x it takes to reboot a certain system has gamma distribution with ex 20 min and stdx 10 min.a compute
Sixty percent of the families in a certain community own their own car, thirty percent own their own homes, and twenty percent own both their own home and own car. If a family in the community is randomly chosen, what is the probability that they ..
the mean weight of lays mini size chips is 28.3 gram with a standard deviation of 1 gram whats the probability to get a
In the world of finance, the buying of stocks and shares can be a risky business. The risk associated with share trading is given by a share's volatility which measures the scale of fluctuations in the price of a share over a past period of time -..
A system's open-loop transfer function is a pure time delay of 0.5 s, so that G(s) = e-s/2. Select a compensator Gc(s) so that the steady-state error for a step input is less than 2% of the magnitude of the step and the phase margin is greater..
In a clinical study of an allergy drug, 115 of the 204 subjects reported experiencing significant relief from their symptoms. At the 0.01 significance level, test the claim that more than half of all those using the drug experience relief.
A significance test is performed and p=.20. Why cant the experimenter claim that the probability that the null hypothesis is true is .20?
A random sampe of 60 teenagers is drawn find the probability that the proportion of teenagers in the sample who play games is less than 0.489
(Degenerate Price Rises) In this exercise, we consider a variation of the -relaxation method that involves degenerate price rises. A degenerate price rise changes the price of a node that currently has zero surplus to the maximum possible value th..
according to a washington post-abc news poll 331 of 502 randomly selected u.s. adults inter- viewed said they would not
A group of exercise scientists claims the length of a workout for range-of-motion exercises is the same as for the other two types. Based on the confidence intervals in part (a), is there any evidence to refute this claim?
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