Car insurance savings

A market researcher wants to evaluate car insurance savings at a competing company. Based on past studies he is assuming that the standard deviation of savings is ${{ params.description.std }}. He wants to collect data such that he can get a margin of error of no more than ${{ params.description.moe_max }} at a {{ params.description.confidence_level }} confidence level.

Part 1

How large of a sample should he collect?

Answer Section

Please enter a numeric value in.

Attribution

Problem is from the OpenIntro Statistics textbook, licensed under the CC-BY 4.0 license.