The distribution of the time until a Web site changes is important to Web crawlers that search engines use to maintain current information about Web sites. The distribution of the time until change (in days) of a Web site is approximated in the following table. a. Determine the cumulative distribution function for the given random variable. x<1.50, 1.50≤ x<3.00, 3.00 ≤ x < 4.50, 4.50 ≤ x < 5.00, 5.00 ≤ x < 7.00, 7.00 ≤ x b. Determine the mean, variance, and standard deviation. c. Calculate the probability mass function of the days until change. x = 1.5 , 3.0 , 4.5 , 5.0 , 7.0
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
The distribution of the time until a Web site changes is important to Web crawlers that search engines use to maintain current information about Web sites. The distribution of the time until change (in days) of a Web site is approximated in the following table.
a. Determine the cumulative distribution
x<1.50, 1.50≤ x<3.00, 3.00 ≤ x < 4.50, 4.50 ≤ x < 5.00, 5.00 ≤ x < 7.00, 7.00 ≤ x
b. Determine the mean, variance, and standard deviation.
c. Calculate the
x = 1.5 , 3.0 , 4.5 , 5.0 , 7.0
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