Week 8 Test
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Part 1 of 4 - Chi Square Test for Homogeneity
8.0/ 8.0 Points
Question 1 of 201.0/ 1.0 PointsA college professor is curious if the location of seat in class affects grades in the class. They are teaching in a lecture hall with 240 students. The lecture hall has 10 rows, so they split the rows into 5 sections – Rows 1-2, Rows 3-4, Rows 5-6, Rows 7-8, and Rows 9-10. At the end of the course, they determine the top 25% of grades in the class, and if the location of the seat makes no difference, they would expect that these top 25% of students would be equally dispersed throughout the classroom. Their observations are recorded below. Run a Goodness of Fit test to determine whether or not location has an impact on the grade. Let α=0.05.Hypotheses:H0: Location in the classroom __________ impact final grade.H1: Location in the classroom _________ impact final grade.Select the best fit choices that fit in the two blank spaces above.
A. does not, doesB. does, does not
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Week 8 Test

C. does, doesD. does not, does notAnswer Key: A
Question 2 of 201.0/ 1.0 PointsClick to see additional instructionsThe manager of a coffee shop wants to know if his customers’ drink preferences have changed in the past year. He knows that last year the preferences followed the following proportions – 34% Americano, 21% Cappuccino, 14% Espresso, 11% Latte, 10% Macchiato, 10% Other. In a random sample of 450 customers, he finds that 115 ordered Americanos, 88 ordered Cappuccinos, 69 ordered Espressos, 59 ordered Lattes, 44 ordered Macchiatos, and the rest ordered something in the Other category. Run a Goodness of Fit test to determine whether or notdrink preferences have changed at his coffee shop. Use a 0.05 level of significance. AmericanosCapp.EspressoLattesMacchiatosOtherObserved Counts1158869594475Expected Counts15394.56349.54545Enter the p-value - round to 5 decimal places. Make sure you put a 0 in front of the decimal.

Question 3 of 201.0/ 1.0 PointsA company manager believes that a person’s ability to be a leader is directly correlated to their zodiac sign. He never selects someone to chair a committee without first evaluating their zodiac sign. An irate employee sets out to prove her manager wrong. She claims that if zodiac sign truly makes a difference in leadership, then a random sample of 210 CEO’s in our country would reveal a difference in zodiac sign distribution. She finds the following zodiac signs for her random sample of 210 CEO’s:BirthsSigns25Aries13Taurus17Gemini21Cancer16Leo18Virgo15Libra16Scorpio20Sagittarius11Capricorn23Aquarius15Pisces