Mathematics, 29.11.2019 04:31 austinwilliams60

To determine whether there is an attendance rate drop of a national conference this year (consider as 1) than last year (consider as 2), a sample of 400 people this year and a sample of 400 people last year were selected. given α=0.01. the data are summarized below:

this year last year difference

attending 359 378 -19

not attending 41 22 19

total number 400 400 400
what is the test statistic?

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