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Need a full and very clear explanation 4. Couples were recruited for a study of how many words people speak in a day. A random

Need a full and very clear explanation

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4. Couples were recruited for a study of how many words people speak in a day. A random sample of 56 males resulted in a mean of 16,576 words and a standard deviation of 7871 words. Use a 0.01 significance level to test the claim that males have a standard deviation that is greater than the standard deviation of 7460 words for females

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