Question
Which test is commonly used to check stationarity in
time series data?Solution
The Dickey-Fuller test is a statistical test used to check for stationarity in time series data. It tests the null hypothesis that a unit root is present (i.e., the data is non-stationary). A significant p-value indicates that the null hypothesis can be rejected, confirming stationarity. For example, this test is often applied before fitting ARIMA models to ensure the data meets the stationarity requirement. Why Other Options Are Wrong : A) Granger Causality Test : Tests causality between two time series, not stationarity. C) Box-Cox Transformation : Stabilizes variance but does not directly test for stationarity. D) Ljung-Box Test : Checks the independence of residuals, not stationarity. E) Kolmogorov-Smirnov Test : Compares distributions but does not assess stationarity.
State’s new law prohibit of the social boycott of individuals, families or any community by informal village councils is a step in the right direc...
The daughter of a brewmaster (A)/for India-based United Breweries, (B)/Mazumdar-Shaw originally planned (C)/following in her father's footsteps (D).
Read the sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in one part of the sentence. The le...
In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option...
It is the ability to continuously (A) / refurbish and nuance all facets of his (B) / game that allows Roger Federer to outcompete (C) / and outlive much...
All year Daly had imitated that (A)/he was ready to step down (B)/and last night reports of his resignation (C)/did not come as any surprise (D).
In the following questions, some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error. The number of...
- Of the four given options, choose the most appropriate one.
Using the fabber, we could conceivably follow nature’s design plans much more closely than we have ever been able to do.
The brilliant administrator was destined for the post of Assistant Commissioner; there was no one to challenge his caliber.