mlexy869 mlexy869

29-04-2024
Mathematics

Answered

Assume that newborn females have birth weights with a mean of 3058 grams and a standard deviation of 695 grams. A random sample of 100 newborn females is obtained and they have a mean birth weight of 2999 grams. What is the probability of randomly selecting another 100 newborn females and getting a mean birth weight that is 2999 grams or lower? Does it seem like a sample mean of 2999 grams is unusual?
Question content area bottom
Part 1
The probability of getting a mean birth weight that is 2999 grams or lower is

0.1977.
(Round to four decimal places as needed.)
Part 2
Since the sample mean lies
more
than 2 standard deviations away from the mean, getting a mean birth weight that is

2999 grams or lower
is
unusual.
(Type an integer or a decimal. Do not round.)

Answer :

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