Carbon monoxide: A recent study examined the effects of carbon monoxide exposure on a group of constmction workers. The following table presents the numbers of workers who reported various symptoms, along with the shift (morning, evening, or night) that they worked. Shift Morning Evening Night Influenza 1'7 14 15 Headache 33 35 4 Weakness 12 12 Shortness 10 9 7 of Breath if Send data to Excel It] (3] Compute the expected frequencies under the null hypothesis. (b) Compute the value of the chi-square statistic- (c) How many degrees of freedom are there? (d) Test the hypothesis of independence. Use the a =D.10 level of significance. What do you conclude