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Suppose a 1/2-pack-or-more-of-cigarettes-a-day smoker has a 200% increased risk of a certain type of serious facial skin condition. How do you interpret this?
Statistics and Probability, Statistics
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Illustrate the difference between straight and cumulative voting systems using as an example a shareholder who owns 5,000 shares and an election in which six directors will be selected. Why might shareholders care about ...
An independent measures study with n = 6 in each sample, produces a sample mean difference of 4 points and a pooled variance of 12. What is the value for the t statistic?
In a sample of 41 temperature readings taken from the freezer of a restaurant, the mean is 29.7 degrees and the standard deviation is 2.7 degrees. What would be the 80% confidence interval for the temperatures in the fre ...
Question 1 From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a standard deviation of 3.54. What is the 95% confidence interval for the ...
A bullying prevention program is underway in the phoenix school districts. The researchers ran multiple analyses with the baseline data. The researchers want to determine if there is a relationship between age (13, 14, 1 ...
A coin is biased so that the probability of obtaining heads is ¾, What is the probability of obtaining at least three heads in four tosses of the coin?
A quality controller selects 8 items at a predefined interval and found that 75% of the time the item was non-defective. Let "S" represent the occurence of a non defective item. Assuming that this experiment is Binomial: ...
The equation used to predict how long a cold will last is y=-1.8 + 0.09x1 + 3.2x2 - 1.9x3, where x1 is person's temperature on the first day, x2 is number of people seen each day, and x3 is the amount of sleep the person ...
Next time you see an elderly man, check out his nose and ears! While most parts of the human body stop growing as we reach adulthood, studies show that noses and ears continue to grow larger throughout our lifetime. In o ...
We choose a number from the set {1, 2, ..., 100} uniformly at random and denote this number by X . For each of the following choices, determine whether the events in question are independent or not. A = {X is even}, B = ...
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