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Hurricane Katrina s hurricane force winds extended 120 miles from its center. Katrina was a big storm, and that affects how we think about the prediction errors.
Suppose we add 120 miles to each error to get an idea of how far from the predicted track we might still find damaging winds. Explain what would happen to the correlation between Prediction Error and Year, and why.
From Group of 40 People, a jury of 12 people is selected. In how many various ways can a jury of 12 people be selected?
Use relative frequencies to estimate the probability that a seed will not germinate. What is your estimate? Use relative frequencies to estimate the probability that a seed will not germinate.
1. An airplane takes off from a coastal city where the air temperature is 20 °C (68 °F) and climbs to cruising altitude. At what altitude will the outside temperature be 0 °C?
the average lifetime of a light bulb is 3000 hours with a standard deviation of 696 hours. a simple random sample of 36
Students need a score of 60 points to pass the exam. What is the probability that a randomly selected student will pas the exam? (P(X ≥ 60))
Researchers conducted an experiment to measure the effect of a drug on improving the quality of sleep as determined by how many more minutes of REM sleep were measured for each participant.
a researcher reports that the correlation between age and physical health of adults over 50 is -.69. one can conclude
You have at least $30 in change in your drawer, consisting of dimes and quarters. Write an inequality that shows the different number of coins in your drawer.
The annual returns, in percentages, on stocks A and B for three possible states of the economy are given in the table below.
Randomly selected nonfatal occupational injuries and illnesses are categorized, according to the day of the week that they first occured, and the results are listed below.
Mean cost of the table in a region is $10 with a standard deviation of $2. Compute the standard deviation of the sampling distribution of sample size 36.
a simple random sample of 60 items resulted in a sample mean of 80. the population standard deviation is 18.a. compute
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