Z Test And T Test Formula. The dataset can be downloaded from here. Suppose a person wants to check or test if tea and coffee both are equally popular in the city.
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The sample follows the gaussian distribution. In that case he can use a z test statistics method to obtain the results by taking a sample size say 500 from the city out of which suppose 280 are tea drinkers. T x1 x2 σ n1 σ n2.
T x1 x2 σ n1 σ n2.
T x1 x2 σ n1 σ n2. T test refers to a univariate hypothesis test based on t statistic wherein the mean is known and population variance is approximated from the sample. The sample follows the gaussian distribution. The dataset can be downloaded from here.
