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Question: More rain for California? The changing climate will probably bring more rain to California, but we don't know whether the additional rain will come during the winter wet season or extend into the long dry season in spring and summer. Kenwyn Suttle of the University of California at Berkeley and his coworkers wanted to compare the effects of three treatments: added water equal to 20% of annual rainfall either during January to March (winter) or during April to June (spring), and no added water (control). Eighteen plots of open grassland, each with area 70 square meters, were available for this study. One response variable was total plant biomass, in grams per square meter, produced in a plot over a year. Describe a completely randomized design for this experiment. Write a few sentences describing how you would implement your design.
Does herbal tea help nursing-home residents? A group of college students believes that herbal tea has remarkable powers.
Find the maximum likelihood estimators 01 and 82 of ()1 and 92 and their approxi mate variance-covariance matrix. In this case, does the latter provide the exact variances and covariance?
Show all the steps of your hypothesis test including a) the claim being tested , b) the null and alternative hypothesis, c) the test statistic, d) the p value, e) initial conclusion, and f) a final conclusion about the original claim.
an article suggests that a poisson process can be used to represent the occurrence of structural loads over time.
If the population standard deviation is $7, and a random sample of 50 properties is chosen, what is the probability that the sample average will be below $35?
a player tosses two coins. if two heads show he wins 4. if one head shows he wins 2 but if two tails show he must pay a
Classify each of the following random variables as discrete or continuous. The number of trees over six feet tall
according to police sources a car with a certain protection system will be recovered 88 of the time. find the
Because of tough economic times, the Indiana legislature is debating a bill that could have significant negative implications for public school funding. There are three possibilities for this bill: (1) it could be passed in essentially its current..
you flip a coin 60 times. you get heads 45 times and tails 15 times. calculate a 95 confidence interval for the true
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated.
The scores of the GRE exam are transformed so they have a mean of 500 and standard deviation of 100. The scores are known to be normally distributed. What is the percentage of students that score below 750?
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