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lilavasa [31]
2 years ago
8

Pls help with this !!!!!!!

Mathematics
1 answer:
arlik [135]2 years ago
7 0

Both methods assume a normal distribution of the data, but the z-tests are most useful when the standard deviation is known.

OR u can use , z-tests are used when we have large sample sizes (n > 30), whereas t-tests are most helpful with a smaller sample size (n < 30). Both methods assume a normal distribution of the data, but the z-tests are most useful when the standard deviation is known.

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With a = 6, we can now write:  96 = 6b^2.  Then b^2 = 16, and b=4.

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