3. An election survey report result with state that the standard error of the mean ( standard deviation of the mean sampling distribution ) is 20. Population standard deviation is 500. a) How many the size ( large ) of the sample used in surveys? b) How many probability that the average estimate will located in +24 intervals of the population mean ?

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3. An election survey report result with state that the standard error of the mean ( standard
deviation of the mean sampling distribution ) is 20. Population standard deviation is 500.
a) How many the size ( large ) of the sample used in surveys?
b) How many probability that the average estimate will located in +24 intervals
of the population mean ?
Transcribed Image Text:3. An election survey report result with state that the standard error of the mean ( standard deviation of the mean sampling distribution ) is 20. Population standard deviation is 500. a) How many the size ( large ) of the sample used in surveys? b) How many probability that the average estimate will located in +24 intervals of the population mean ?
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