A recent study examined the effects of carbon monoxide exposure on a group of constructionworkers.The following table presents the numbers of workers who reported varioussymptoms,along with the shift(morning,evening,ornight)that theyworked.

	Morning Shift	Evening Shift	Night Shift
Influenza	15	18	20
Headache	32	26	5
Weakness	16	11	6
Shortness of Breath	7	11	11

Send data to Excel

Test the hypothesis ofindependence.Use the = 0.01

level of significance and theP-value method with the TI-84 Pluscalculator.What do youconclude?

Part 1 of 4

State the null and alternatehypotheses.

H0 : The shift and reported symptoms (Choose one) independent. Are or are not? H1 : The shift and reported symptoms (Choose one) independent. Are or are not? This hypothesis test is a (Choose one) test. left, right or two tailed test?

what is the P- value?

Do we have reject or fail to reject Ho ?

Do we have enough evidence to support the hypothesis?