Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of transportation was bus (B) or subway (S) and 80 whose primary mode was Metro-North (MN) or the Long Island Railroad (LIRR). Of the 51 in the first group, the mean annual income was $40,000 with a standard deviation of $5,100; of the 80 in th
Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of transportation was bus (B) or subway (S) and 80 whose primary mode was Metro-North (MN) or the Long Island Railroad (LIRR). Of the 51 in the first group, the mean annual income was $40,000 with a standard deviation of $5,100; of the 80 in th
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary
(a) What is the difference of the sample means (to one decimal place)?
(b) What is the standard error of the difference of sample means (to 3 decimal places)?
(c) How many degrees of freedom (df) are there?
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