# In a random sample of 550 current sales 188 came from

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In a random sample of 550 current sales, 188 came from Clothing, 153 Home Appliances, 83 Housewares, 54 Cosmetics, 61 Jewelry, and 11 Other. At α=0.10, can the manager conclude that the distribution of sales among the departments has changed? A. yes because the p-value is .0006 B. no, because the p-value is .0006 C. yes because the p-value = .0321
D. no, because the p-value = .0321 Answer Key: C Feedback: Clothing Home App. Housewares Cosmetics Jewelry Other Observed Counts 188 153 83 54 61 11 Expected Counts 550*.30 = 165 550*.25 = 137.5 550*.18 = 99 550*.13 = 71.5 550*.12 = 66 550*.02= 11 Use Excel to find the p-value =CHISQ.TEST(Highlight Observed, Highlight Expected) The p-value is < .10, Reject Ho. Yes, this is significant. Part 2 of 4 - Chi Square Test for Independence 6.0/ 6.0 Points Question 9 of 20 1.0/ 1.0 Points Click to see additional instructions A restaurant chain that has 3 locations in Portland is trying to determine which of their 3 locations they should keep open on New Year’s Eve. They survey a random sample of customers at each location and ask each whether or not they plan on going out to eat on New Year’s Eve. The results are below. Run a test for independence to decide if the proportion of customers that will go out to eat on New Year’s Eve is dependent on location. Use α=0.05 NW Location NE Location SE Location Will Go Out 66 40 45 Won’t Go Out 20 25 20 .
Enter the P -Value - round to 4 decimal places. Make sure you put a 0 in front of the decimal.
Question 10 of 20 1.0/ 1.0 Points A manufacturing company knows that their machines produce parts that are defective on occasion. They have 4 machines producing parts, and want to test if defective parts are dependent on the machine that produced it. They take a random sample of 321 parts and find the following results. Test at the 0.05 level of significance.
Machine 1 Machine 2 Machine 3 Machine 4 Defective 10 15 16 9 Non-Defective 72 75 66 58 Can it be concluded that number of defective parts is dependent on machine?