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Performing a Chi-Square Goodness-of-Fit Test In Exercises 7-16, (a) identify the claim and state Ho and Ha, (b) find the critical value and identify the rejection region, (c) find the chi-square test statistic, (d) decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim. 9. Ordering Delivery A research firm claims that the distribution of the days of the week that people are most likely to order food for delivery is different from the distribution shown in the figure. You randomly select 500 people and record which day of the week each is most likely to order food for delivery. The table shows the results. At a = 0.01, test the research firm's claim. (Source: Technomic, Inc.) Food at your door Survey results Day of the week Americans are most likely to order food for delivery: Day Frequency, f Thursday Sunday 43 Need 10% Friday Monday 16 36% Tuesday 25 Saurdry 24% Wednesday 49 Thursday 46 Friday 168 Saturday 153