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A random sample of 80 lawyers was taken, and they were asked if they are in favour of or against capital punishment. The following table gives the two-way classification of their responses.
Statistics and Probability, Statistics
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The random variable X takes on the values 5, 20, 30, and 200 with probabilites 0.60, 0.30, 0.08, and 0.02 respectively. Use the statistical capacity of your calculator to find the expected value of Xrounded to one place ...
Seedlings come in packages of 10 and consist of the following: 2 Douglas-fir, 3 spruce, and 5 pines. In any given package, how many ways can the 10 seedlings be arranged if seedlings that are the same species cannot be d ...
Your friend randomly chooses a square picture frame from the store. Let X be the height in inches of the picture frame. Based on your knowledge of the square picture frames at the store, you know that the expected height ...
If you know the percentile rank is 50. The mean is 50 and the standard deviation is 5. What is the raw score, z score, and t score?
Now assume that I am talking about a normally distributed set of data: An IQ test. This IQ test has a mean of 100 and a standard deviation of 15. Find the following probabilities What is the probability that someone scor ...
The mean throwing distance of a football for a Luis, a high school freshman quarterback, is 50 yards, with a standard deviation of three yards. The team coach tells Luis to adjust his grip to get more distance. The coach ...
The table shows the results of a survey in which 400 adults from the? East, 400 adults from the? South, 400 adults from the? Midwest, and 400 adults from the West were asked if traffic congestion is a serious problem. Co ...
The company's cleaning service states that they spend more than 46 minutes each time the cleaning service is there. The company times the length of 37 randomly selected cleaning visits and finds the average is 47.6 minut ...
A recent college graduate has taken a new job at Work LLC, and since the company does not offer a traditional pension plan, she plans to take advantage of a tax-free investment account backed by a reputable financial ins ...
Let N ( m , v ) denote the normal random variable with mean m and variance v . (a) If X is a Standard Normal variable, what is the distribution of the random variable 4 X - 1? (b) If X ~ N (3,1) and Y ~ ...
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