A consignment of 7 refrigerator sets contains 5 sets with no scratch on them. A hotel makes a random purchase of 3 of the sets. If X is the number of refrigerator sets purchased with a scratch on it, a) Find the probability distribution of X. b) Find the Cumulative Distribution Function (CDF) of X. c) Construct a graph of the CDF.
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.
A consignment of 7 refrigerator sets contains 5 sets with no scratch on them. A hotel makes a random purchase of 3 of the sets. If X is the number of refrigerator sets purchased with a scratch on it, a) Find the
b) If U and V are two independent standard normal random variables and Z=0.6U+0.8V. Determine Corr (U , Z) iii) On the basis of a survey of 25 random typists, a confidence interval for the mean time needed to complete typing a page was (5.588; 6.412). Knowing that the distribution of the time needed to type a page is normal, and the sample standard deviation was equal to 1, determine the confidence level used for the calculations.
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