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A Kansas University research station wishes to investigate if a new variety of wheat is more resistant to a disease than an old variety. It is known that this disease strikes approximately 15% of all plants of the old variety. A field experiment was conducted, and of 120 new plants, 12 became infected.
The calculated value of the test statistic is:



1.83

1.10

-1.53

1.53

1.83

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