Determine the sample size required to estimate the mean score on a standardized test within 2 points of the true mean with 99% confidence. Assume that s = 13 based on earlier studies
The sample size required is?

280

Step-by-step explanation:

Margin of error = critical value × standard error

Here, the margin of error is 2.

At 99% confidence, the critical value is z = 2.576.

The standard error is s / √n = 13 / √n.

2 = 2.576 (13 / √n)

2 = 33.49 / √n

√n = 16.74

n = 280.4

Rounded to the nearest person, the required sample size is 280.

a

step-by-step explanation:

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i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )