Which statement below is incorrect?Select one:A. In a survey study, we can never completely eliminate the random error, but it is possible to completely eliminate the systematic error.B. Compared to the simple random sampling, it is easier to manipulate data with the systematic random sampling.C. PACF and ACF can never have the same value.D. If a time series has an upward trend over time, it cannot be stationary.

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thoumToofwj · Accepted Answer

From the given statements the correct statements are,1. In a survey study, we can never completely eliminate the random error, but it is possible to completely eliminate the systematic error.The statement is correct because we cannot eliminate the random error completely but can possibly eliminate systematic error.2. Compared to the simple random sampling, it is easier to manipulate data with the systematic random sampling.Since, it correct that it is easier to manipulate data with the systematic random sampling than simple random sampling3. If a time series has an upward trend over time, it cannot be stationarySince, an upward trend it time dependent and cannot be stationary, which is a correct statement. Thus the incorrect statement is,- PACF and ACF can never have the same value.Since, the value of PACF and ACF is same at the first lag because both measure the correlation between data points at time t with data points at time t − 1. Thus, the statement is incorrect.

Which statement below is incorrect? Select one: A. In a survey study, we can never completely elim

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