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The weight of baby seals is believed to be Normally distributed, with a mean of 69.5 pounds. The average weight of a random sample of 25 baby seals is found to be 69.75 pounds, with a standard deviation of 4.2 pounds. What is the standard error of the mean?
0.84
0.30
0.25
0.17
We are unable to determine the standard error of the mean because we do not know σ.

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9falvarez

Answer is a because the standard error

raphealnwobi

The standard error of the mean for the babies is 0.84.

What is the z score?

The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:

z = (raw score - mean) / standard deviation

Given that mean = 69.75 pounds, standard deviation = 4.2 pounds. For a sample of 25:

Standard error of the mean = 4.2 / √25 = 0.84

The standard error of the mean for the babies is 0.84.

Find out more on z score at: https://brainly.com/question/25638875

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