Three Traditional Variable Sampling Methods

Three methods of traditional variable samplingMean value method, difference method, ratio method.

1, mean method definition: the CPA first calculates the average of the audited amounts of all items in the sample, and then multiplies this sample average by the overall size to arrive at an estimate of the overall amount. The difference between the overall estimated amount and the overall carrying amount is the inferred overall misstatement.

2. Definition of the difference method: The CPA first calculates the average difference between the sample audited amount and the carrying amount, and then multiplies this average difference by the overall size to derive the difference between the overall audited amount and the carrying amount (i.e., the overall misstatement).

3. Definition of the ratio method: The CPA first calculates the ratio between the sample's audited amount and the carrying amount, and then multiplies this ratio by the overall carrying amount to find the estimated overall amount.

Mean Estimate Sampling Method

Variable sampling in the sample by sampling to determine the average value of the sample to infer the overall average and the total value of the statistical sampling technique, known as the mean estimate sampling method.

The mean estimation sampling method can be used to verify the correctness of account balances or occurrences. When the examiner does not have access to the overall values being examined or simply cannot trust the figures provided by the unit being examined.

This method can still be used but, when applying this method, the workload of calculating the standard deviation is relatively large. This is because the calculation of the standard deviation in the mean estimation method needs to take into account the value of each item in the initial sample or the total.

Stratified Sampling Method

Stratified Sampling Method is a statistical sampling technique in which the whole is divided into a number of strata according to a certain sign, and a certain number of samples are sampled from each stratum respectively, and finally the required estimate of the whole is summarized and projected. The reasonable use of stratified sampling method in variable sampling audit, can improve the accuracy of sampling, reduce the need to sample.

When applying the stratified sampling method, it is necessary to reorganize the total and the calculation is complicated. Therefore, the use of stratified sampling method only makes sense when most of the items in the overall survey (the amount of money) is evenly distributed, and a few items belong to the high amount or low amount of abnormal items such as the use of stratified sampling method.