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0.0/ 1.0 PointsQuestion 1 of 20Click to see additional instructionsAn urban economist is curious if the distribution in where Oregon residents live is different today than it was in1990. She observes that today there are approximately 3,109 thousand residents in NW Oregon, 902 thousandresidents in SW Oregon, 244 thousand in Central Oregon, and 102 thousand in Eastern Oregon. She knows that in1990 the breakdown was as follows: 72.7% NW Oregon, 20.7% SW Oregon, 4.8% Central Oregon, and 2.8%Eastern Oregon.Can she conclude that the distribution in residence is different today at a 0.05 level of significance?Enter the test statistic - round to 4 decimal places.Week 8 Knowledge Check Homework Practice QuestionsReturn to Assessment ListPart 1 of 4 - Chi-Square Test for Homogeneity0.0/ 8.0 Points
Test Stat =MATH302 I008 Win 20Tests & QuizzesTests & QuizzesYou can access the new Success Center via the left hand navigation in your classrooms. This tool is updatedregularly and provides access to hundreds of relevant resources geared towards your academic and professionalgoals. Check it out!
0.0/ 1.0 PointsA company that develops over-the-counter medicines is working on a new product that is meant toshorten the length of sore throats. To test their product for effectiveness, they take a random sample of 110 peopleand record how long it took for their symptoms to completely disappear. The results are in the table below. Thecompany knows that on average (without medication) it takes a sore throat 6 days or less to heal 42% of the time, 7-9days 31% of the time, 10-12 days 16% of the time, and 13 days or more 11% of the time.Can it be concluded at the 0.01 level of significance that the patients who took the medicine healed at a different ratethan these percentages? After running a Goodness of Fit test, can it be concluded that there is a statistically significantdifference in duration of a sore throat for those that took the medicine and what is the p-value?6 days or less7-9 days10-12 days13 or more daysDuration of Sore Throat4940129Expected Counts46.234.117.612.10.0/ 1.0 PointsClick to see additional instructionsA college professor is curious if the location of a seat in class affects grades in the class. They are teaching in alecture hall with 240 students. The lecture hall has 10 rows, so they split the rows into 5 sections – Rows 1-2, Rows3-4, Rows 5-6, Rows 7-8, and Rows 9-10. At the end of the course, they determine the top 25% of grades in theQuestion 2 of 20A company that develops over-the-counter medicines is working on a new product that is meant toshorten the length of sore throats. To test their product for effectiveness, they take a random sample of 110 peopleand record how long it took for their symptoms to completely disappear. The results are in the table below. Thecompany knows that on average (without medication) it takes a sore throat 6 days or less to heal 42% of the time, 7-9days 31% of the time, 10-12 days 16% of the time, and 13 days or more 11% of the time.Can it be concluded at the 0.01 level of significance that the patients who took the medicine healed at a different ratethan these percentages? After running a Goodness of Fit test, can it be concluded that there is a statistically significantdifference in duration of a sore throat for those that took the medicine and what is the p-value?6 days or less7-9 days10-12 days13 or more daysDuration of Sore Throat4940129Expected Counts46.234.117.612.1
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Question 3 of 20Click to see additional instructionsA college professor is curious if the location of a seat in class affects grades in the class. They are teaching in alecture hall with 240 students. The lecture hall has 10 rows, so they split the rows into 5 sections – Rows 1-2, Rows3-4, 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
0.0/ 1.0 Pointsclass, and if the location of the seat makes no difference, they would expect that these top 25% of students would

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