A researcher claims that 25% of individuals aged 15 - 30 actually like to eat vegetables. In order to test this claim, a random sample of 200 individuals within the specified age group was taken revealing 21% saying "Yes, I like to eat vegetables." Taking p = 0.25 to be the hypothesized value of the population proportion, which of the following is the value of the test statistic z? The correct answer is -1.31

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