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General Discrete Random Variable Suppose uppose the grading for a course project can only have 6 possible outcomes; 100, 90, 80, 70, 60, 50, and 0. Let the random variable X be the scores on the project. Suppose X has the following distribution: x 100 90 80 70 60 50 0 P(X=x) 0.05 0.35 0.3 0.1 0.1 0.08 0.02 a. What is the probability that X is AT MOST 70? b. What is the probability that X is AT LEAST 80%? c. What is the probability that X is MORE than 80? d. What is the probability that X is LESS than 70? e. Compute the expected value for this random variable (see page 269 of text).
Hanna Properties specializes in custom-home resales in the Equestrian Estates, an exclusive subdivision in Phoenix, Arizona. A random sample of nine custom homes currently listed for sale provided the following information on size and price.
Use regression analysis to develop an estimated regression equation that could be used to predict the value score given the price of the car.
a. what is the point estimate of the population mean? b. what is the point estimate of the population standard deviation?
Finding appropriate z- and t-scores is important when constructing confidence intervals. Confidence intervals allow one to estimate important population parameters such as population mean, population proportion, population standard deviation, etc.
What is a factor? How can the use of factors benefit a design, explain main effects and interaction effects and how does a covariate reduce noise?
Write a brief summary of the distribution of life expectancy.
Now suppose 3 of his customers want the same ring, and they will go to another store if its already been sold. Would it be appropriate to use the binomial distribution under these conditions? Why or why not?
Let p represent the population proportion of all numbers in the corporate file that have a first nonzero digit of 1. Test the claim that p is less than 0.301 by using What is the P-value of the test statistic?
The chance of winning a prize for each of the 15 plays is 50-50 if you bought 15 tickets, what is the chance of winning 10 or more prizes?
Two boats the prada (Italy) and the oracle (USA) are competing for a spot in the upcoming Americans cup race. They race over a part of the course several times. Below are the sample times in minutes at the .05 significance level.
Create the 95% confidence interval about mean value of y, number of days absent, given x = 95 degrees, and = 0.449x - 30.27
How many participants need to be enrolled in each group to have 90% chance of detecting a significant difference using a two-sided test with a a= .05 if compliance is perfect?
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