A survey is planned to compare salaries of plant managers in two regions The plan is to take a sample of 400 plant managers from each region and ask their annual salaries. Assume that previous sample statistics suggest that o, =o,-$5000. Are the sample sizes sufficient to produce a 95% confidence interval on uy-, having a width of only $2000? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table The sample sizes v sufficient because the samples would need to be at least people each, which is the planned sample sizes of 400. (Round up to the nearest whole number as needed )

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A survey is planned to compare salaries of plant managers in two regions The plan is to take a sample of 400 plant managers from each region and ask their annual salaries. Assume that previous sample
statistics suggest that o, =o,=$5000. Are the sample sizes sufficient to produce a 95% confidence interval on uy- , having a width of only $2000?
Click here to view page 1 of the standard normal distribution table.
Click here to view page 2 of the standard normal distribution table
The sample sizes
v sufficient because the samples would need to be at least
people each, which is
the planned sample sizes of 400.
(Round up to the nearest whole number as needed )
Transcribed Image Text:A survey is planned to compare salaries of plant managers in two regions The plan is to take a sample of 400 plant managers from each region and ask their annual salaries. Assume that previous sample statistics suggest that o, =o,=$5000. Are the sample sizes sufficient to produce a 95% confidence interval on uy- , having a width of only $2000? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table The sample sizes v sufficient because the samples would need to be at least people each, which is the planned sample sizes of 400. (Round up to the nearest whole number as needed )
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