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Mathematics, 23.02.2021 01:00 tshaw04614

A psychologist claims that the mean age at which children start walking is 12.5 months. The following data give the age at which 18 randomly selected children started walking.

14 11 17 13 15 13 17 11 18

17 13 17 15 15 16 13 15 14

Test at the 1% level of significance if the mean age at which children start walking is more than 12.5 months.

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A psychologist claims that the mean age at which children start walking is 12.5 months. The followin...
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