Question: State the requirements that must first be satisfied before running a z -test for the difference between two means.Check all that apply. _The populations must

State the requirements that must first be satisfied before running a z-test for the difference between two means.Check all that apply.

_The populations must be approximately normal.

-The samples must be dependent.

_Both samples need to be random samples.

_The samples must be independent of each other.

_The standard deviations for both populations must be known.

_If the sample sizes are less than 30, the populations need to be approximately normal.

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