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Baby talk: In a sample of 68 children, the mean age at which they first began to combine words was 16.42 months, with a standard

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Baby talk: In a sample of 68 children, the mean age at which they first began to combine words was 16.42 months, with a standard deviation of 9.76 months. Part: 0 / 2 Part 1 of 2 Construct a 99% interval for the mean age at which they first begin to combine words. Round the answers to two decimal places. A 99% confidence interval for the mean age is

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