The Director Securities and Exchange Commission of Pakistan reported that the mean rate of return on a sample of 11 lubricant stocks was 14.6% with a standard deviation of 3.0%. The mean rate of return on a sample of 6 utility stocks was 10.8% with a standard deviation of 3.8%. At the one percent significance level, can we conclude that there is lesser variation in the lubricant stocks? plz solve it accurately i will rate u dont use excel plz

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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.