For a random walk to be an appropriate model for a time series, which of the following should be true? a. There shouldn't be any significant autocorrelations in the series. b. Except for noise, each value in the series should equal the previous value plus a constant. c. Except for noise, the series should be flat. d. All of these choices are true.
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.
For a random walk to be an appropriate model for a time series, which of the following should be true?
a. There shouldn't be any significant autocorrelations in the series.
b. Except for noise, each value in the series should equal the previous value plus a constant.
c. Except for noise, the series should be flat.
d. All of these choices are true.
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