Question: Some statistics instructors use an online homework system and some do not. Does this influences final exam scores? A random sample of 145 students from




























Some statistics instructors use an online homework system and some do not. Does this influences final exam scores? A random sample of 145 students from stat classes that use an online homework system and a sample of 147 students from stat classes that do not use an online homework system were taken. Of those students in stat classes that use an online homework system, 106 of them passed the final. Of those students in stat classes that did not use an online homework system, 91 of them passed the final. Is there evidence that a higher percentage of students passed the final who were in classes where an online homework system was used? a) Test at the 4% level b) Compute a 92% confidence interval for the difference in proportions. Use the steps of PHANTOMS for the hypothesis test. For the confidence interval you do not need to do all the steps of PANIC since you did some of them already in PHANTOMS. You just need to do the MIC of PANIC. Part a.) HYPOTHESIS TEST P: Parameter What is the correct parameter symbol and wording for population 1? Select an answer v = Se Select an answer \"I parameter symbol and wording for population 2? [mi |= Part a.) HYPOTHESIS TEST P: Parameter What is the correct parameter symbol and wording for population 1? Select an answer v = Select an answer v Select an answer All stat students in classes that use an online homework system that passed the final 145 randomly selected stat students in classes that use an online homework system Whether or not a randomly selected stat student in a class that uses an online homework system passed the final IA randomly selected stat student in a class that uses an online homework system All stat students in classes that use an online homework system A randomly selected stat student in a class that uses an online homework system that passed the final The percentage of all stat students in classes that use an online homework system that passed the final The percentage of 145 randomly selected stat students in classes that use an online homework system that passed the final What is the correct parameter symbol and wording for population 2? Select an answer V Sel Select an answer H: | p2 ud X2 ull and alternative hypotheses: N2 P2 nswer v ? vWhat is the correct parameter symbol and wording for population 2? Select an answer v = Select an answer v Select an answer All stat students in classes that did not use an online homework system that passed the final 147 randomly selected stat students in classes that did not use an online homework system Whether or not a randomly selected stat student in a class that did not use an online homework system passed the final The percentage of all stat students in classes that did not use an online homework system that passed the final All stat students in classes that did not use an online homework system A randomly selected stat student in a class that did not use an online homework system A randomly selected stat student in a class that did not use an online homework system that passed the final The percentage of 147 randomly selected stat students in classes that did not use an online homework system that passed the final H . -|innr\\lnnanculnr\\1||') \\III I H: Hypotheses Fill in the correct null and alternative hypotheses: Ho : Select an answer V ? V Select an answer N1 - N2 HA : n 1 - 1 2 ? V M1 - M2 P1 - p2 A: Assumptip2 X1 - X2 Since S ud formation was collected from each obH: Hypotheses Fill in the correct null and alternative hypotheses: Ho : Select an answer v ? v ? HA : Select an answer v NAAVIHIV A: AssumptionsH: Hypotheses Fill in the correct null and alternative hypotheses: =elect n answer N1 - N; A: Assumpti n1 - n2 X1 X2 Since E in in formation was collected from each obj conditions: F51 - F52 pd Check all p1 - p2 H: Hypotheses Fill in the correct null and alternative hypotheses: Ho : Select an answer v ? v HA : Select an answer V ? v ? 2 A: Assumptions S Since Select an answer v inf # ition was collected from each ob conditions: SA: Assumptions Since Select an answer v information was collected from each object, we need to check the following condition Select an answer quantitative Check qualitative O The samples are independent. On1 - x1 2 10 and n2 - X2 2 10 Normal population or n1 2 30 and n2 2 30 with no outliers for each group. ON1 2 20n1 and N2 2 20n2 O The samples are dependent. Do is unknown for each group. Normal population or at least 30 pairs of data with no outliers in the differences Ox1 > 10 and X2 2 10Check those assumptions: C1= which is ? v 2 2 = which is 2 n1 - 21 = whi - ? v S n2 - 22 = which is ? v Population sizes are not given. We will assume that N1 >= 20(n1) and N2 >= 20(n2)Check those assumptions: 5 = 20(n1) and N2 >= 20(n2) Check those assumptions: 5 . D ; Population sizes are not given. \\-IV V II We will assume that N1 >= 20(n1) and N2 >= 20(n2 Check those assumptions: C1 = which is ? v 2 = which is ? v n1 - C1 = which is ? v n2 - 02 = which is ? v ? Population sizes are not given. VIVHIA We will assume that N1 >= 20(n1) and N2 >= 20(n
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