The CEO of a large financial institution claims that, on average, their clients invest more than R95 000 per year in a particular portfolio. Test this claim at the 10% significance level if it was found that a sample of 26 clients invested an average of R94 000 in the portfolio over the last year, with a standard deviation of R11 000.

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.