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A Random Sample of Size N Has Been Selected from a Normally

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A random sample of size n has been selected from a normally distributed population whose standard deviation is s. In estimating an interval for the population mean, the t-distribution should be used instead of the z-test if: A n30 and σ is knownBσ is unknown and estimated by s, and the population is normal. C Population is normal and σ is known.DNone of these choices are correct. \begin{array}{|l|l|}\hline A&\text { \( n \geq 30 \) and \( \sigma \) is known}\\\hline B&\text {\( \sigma \) is unknown and estimated by \( s \), and the population is normal. }\\\hline C&\text { Population is normal and \( \sigma \) is known.}\\\hline D&\text {None of these choices are correct. }\\\hline \end{array}

Recognize the materials used in DNA sequencing reactions.
Grasp the procedural steps involved in DNA extraction from cells.
Understand the concept and applications of DNA profiling.
Comprehend the scope and significance of genomics.

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