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Weight Cost 1.897 53.6 3.019 184.9 0.453 6.4 0.988 23.5 1.058 33.4
Confidence Interval Question I have already attached excel file and Z table down blow . Thank you in advance.
Use the excel I attached and determine the number of observations needed to be 89% confident that the estimate of the average weight is within 0.3 units of the overall mean weight. Note: Assume that the pilot study standard deviation is a good estimate of the population standard deviation, that an appropriate value from the Z-table can be used, and that hand calculations are used to find the answer (i.e. do not use Kaddstat). Hint: in Excel, use Data > Data Analysis > Descriptive Statistics, to find the sample standard deviation.
This question was answered on: Feb 21, 2020
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