Question

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=47.2. You would like to be 99% confident that your estimate is within 0.5 of the true population mean. How large of a sample size is required? [Do not round mid-calculation. However, use a critical value rounded to three decimal places — this is important for the system to check answers correctly.] n =

Name: you want to obtain a sample to estimate a population mean based on previous evidence you believe the population standard deviation is approximately 472 you would like to be 99 confident that 68198
Uploaded: 2022-05-10T12:23:14-08:00
Duration: 1 min 19 s
Channel: Kari Hasz
Description: you want to obtain a sample to estimate a population mean based on previous evidence you believe the population standard deviation is approximately 472 you would like to be 99 confident that 68198

          You want to obtain a sample to estimate a population mean. Based
on previous evidence, you believe the population standard deviation
is approximately σ=47.2. You would like to be 99% confident
that your estimate is within 0.5 of the true population
mean. How large of a sample size is
required?
[Do not round mid-calculation. However, use a critical
value rounded to three decimal places — this is
important for the system to check answers correctly.]
n =

Added by Frank K.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Kari Hasz

05/10/2022

Step 1

Critical value = 2.575 (rounded to three decimal places) ** Show more…

Show all steps

Thanks for your feedback!

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=47.2. You would like to be 99% confident that your estimate is within 0.5 of the true population mean. How large of a sample size is required? [Do not round mid-calculation. However, use a critical value rounded to three decimal places — this is important for the system to check answers correctly.] n =