Estimate population mean HSS.IC.B.4 Grade Practice Test Questions TOC | Lumos Learning

Estimate population mean HSS.IC.B.4 Question & Answer Key Resources Lumos StepUp ACT Practice Program - Mathematics

Lumos StepUp ACT Practice Program - Mathematics Estimate population mean

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A welding manufacturing company prides itself on the accuracy of the measurements of the parts the company manufactures. A specific part is supposed to be 7.25 millimeters long. The company tested 200 of the parts and found that the mean size of the parts in the sample was 7.38 inches long. Given the table below that shows the common z-scores. What is the margin of error for a 99% confidence interval for the parts' size?

  1. 1.023
  2. 1.344
  3. 1.433
  4. 1.214

Resource: Question

Question Type: Hot Text

Standard(s):HSS.IC.B.4

Standard Description: Use data from a sample survey to estimate a population mean or proportion; develop a margin of error through the use of simulation models for random sampling.

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