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Suppose X is a uniform random variable with a = 25 and b = 25.
a. Carefully sketch a graph of the probability density function for X.
b. Find the mean, variance, and standard deviation of X.
c. Find P(-0
d. Find P(X > 0) and P(X ≥ 0).
e. Find P(X ≥ 20 | X ≥ 10).
A sample of 40 decaffeinated-coffee drinkers showed a mean of 5.84 cups per day, with a standard deviation of 1.36 cups per day. Use the .01 significance level. Compute the p-value.
The age distribution of householders is an important tool for marketer interested in providing age-appropriate advertising for the particular product they wish to market. What is the probability that fewer than 135 householders will be between 45 a..
what is an example of a variable for which we would use a x2
The American Automobile Association checks the prices of gasoline before many holiday weekends.
Your manager, who just read an abridged version of a statistics book, wants you to test hypotheses for the difference in two population means.
In each problem, also state the assumptions necessary for a binomial distribution, and indicate whether the assumptions are reasonable.
Find the least squares line for the data, Predict the sales performance for the first 6 months of an applicant who scores 66 on the aptitude test.
there is a row of n chairs each containing a student. let an be the number of ways to reassign seats so that each
In a regression analysis involving 30 observations, the following estimated regression equation was obtained.
Compute a 95% confidence interval for the population mean, based on the sample 1, 2, 3, 4, 5, 6, and 30. Change the number from 30 to 10 and recalculate the confidence interval.
The thickness of metal plates made by a particular machine are normally distributed with mean of 4.3 mm and standard deviation of .0.12 mm. What is the value of c for which there is 80% probability that a metal plate has a thickness with in the in..
What information is obtained from measurements on an interval scale compared to measurements on an ordinal scale. What information is obtained from measurements on a ratio scale compared to measurements on an interval scale?
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