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Course listEPR 671, Fieldwork Methods in Educational Research EPR 678, Research in Child Development EPR 628, Interpretive Methods in Educational Research EPR 692, ...

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Course listEPR 671, Fieldwork Methods in Educational Research EPR 678, Research in Child Development EPR 628, Interpretive Methods in Educational Research EPR 692, Theory of Measurement EPR 652, Nonparametric StatisticsPrintDone

Course list EPR 671, Fieldwork Methods in Educational Research EPR 678, Research in Child Development EPR 628, Interpretive Methods in Educational Research EPR 692, Theory of Measurement EPR 652, Nonparametric Statistics Print Done



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Course Selection A student entering a doctoral program in educational psychology is required to select two courses from the list of courses provided as part of his or her program. (FIGURE CANNOT COPY) (a) List all possible two-course selections. (b) Comment on the likelihood that the pair of courses EPR 630 and EPR 645 will be selected.

So in a large school district, we know that a researcher identified all full time teachers and then randomly selected 30 of them to be interviewed. So what type of sampling method was used? A random sampling method is used. How do we know this? Well, it states that he, the researcher, randomly selected off 30 and a random sample method is where all members of the population have an equal chance of being selected. So as long as you were a full time teacher, you had unequal chance of being selected to be interviewed.

Idea for this question. We have math and reading a treatment scores, as are better. And we need to use that as we have to draw a back to back Stam and deport. That's first reviewed that we know that it renders mainly thrown 52 to 7 to 80. So, actually, as for all stand numbers if, uh, well, we can truce. 567 and eight. But he ordered to make a clearer illustration for out there. I think it may be better for us to have another lines or categories we can truce. 55 66778 and eight. Well, for the 1st 15 it means that that renders from 50 to 54 on. For this, it means 55 to 59. And for us for the 1st 6 and means 60 to 64 for 76 This mean that means 65 to 69 and other medias are the same because we have a lot of numbers were evolving involving our questions. So if we separate that as this way, it makes the distribution looks clearer. So let's do it. Uh, we have a math group and reading group last draw. Two lines here. Okay, that's first do the math scores and reviews the first room. It starts with 52. So I write it here, then 66. It is about 65 right here. That 69 then 62 then 61. OK, for a next row of math scores. It starts with 63 than 57. The 59 then 59 then 55 who are certain row? We have 55 59 70 War, then 72 then 70 Streak for our last roll Of my scores, we have 68 then 76 soundly. Three. Okay, I think we have some here and just just to review, we see that for all of the numbers here, the boat, they're the same or above five. For all the numbers here, the Seymour above five. So I think about correct. That's why we want to the radiant scores for the first roll. It started with 65. So we need to write a five here, then to 76. So just right to six here. Then we have another 66. Well, 66 after runner here. That 67 right here. Okay. For our second role, we start with 71 70 70 66 again, which is here. That 61 is here. Ok, we have for the circle. We have six. Few. One 16 I then 78 then 76 then 77. Okay, now let's more to our last roll. Start with 77. 77 then Eddie. Okay? Just to make me to clarify we for double track, we have numbers. 56769 All of them on the same or ball five on the same for this route. So I think that so this is our back to back Stanley people. But there's just one little single means to be done, which is to rent that there are inside each rope off this pot because, uh, it will give us a clear road illustration for these distribution of the data. So, for example, for the right right hand side ready in part, we need to rather there are problems more too big. So for these go here when he could write 56679 So that's just the right it. 56 It's on for next role. We have 001 for next one. We have 36 re seven and 18 So let's just right, right. It was 777 and eight. I think we're done here for a right hand side, where the reading scores that you want our mass portion for a black inside. We need to run that are from the biggest to the smallest. Is that so? Let's let's do it for our second row. We have three Nice 17 on 25 That's just rewrite it. Way. Have three Nice 17 on two fives. Okay for our next row. Extra Penis. 321 from that's roll, it should be 987 on 986 on that. So it should be forced Richard to. It's just we write it or three Street and to, And this is our completed back to back stamp on leave course on let's reveal their distributions. It's clear that the reading scores Distributions Peak is bigger than mass scores because it meaning concentrates our scores. Beginning with seven. And for math course, most of the students will get fifties or sixties as your scores. So it's me. It means that maybe the reading part is easier. That math and also, uh, big The highest score for reading is is higher than the higher score math because 80 is bigger than 76 on Also, we know that for the movers scores for reading it is 61 the arrests for mass scores. There are already seven students who have scored spino 60 which means that they failed the course. The total scores 100. So this is our back to back stem and leaf lot second.

So this question. We see that the CDC estimates that 7% of the Children in Oregon the kindergartners tender garden nurse in Oregon, had non medical waivers. They had non medical waivers for vaccines. No, again, this is. We're trying to determine whether this is an example of descriptive for inferential statistics, and one part of inferential statistics is estimation. And because we see that the key word here is estimates they didn't ask every single person, every single kindergartener in Oregon. This is an estimation this is saying about the population were inferring where we're guessing about what proportion of kindergartners had non edible waiters for vaccines. Because of this, Because inferential statistics uses estimates, we see that it's inferential statistics.

In Problem 22 told that the overall U. S. Public health tradition high school graduation rate in 73.4% and for two states, Pennsylvania and Idaho it is 83.5% and 80.5% respectively. And you can see the difference is only 3% tool that random samples of 1200 students from its it sure that 980 from Pennsylvania graduated while 940 from Idaho graduated. So we're going to be testing the clean. There's a difference in the proportion off graduating students between the states, and we will do so using the 0.5 level of significance. So the first step is to state the they're not hypothesis on the alternative hypothesis. So the number of this is his P one equals P two. The alternative before this is is p one is not equal to be to, and this is the claim that we agreed to test. Next, the level of significance is 0.5 and since this is a two tails test, the critical Nadhim is plus or minus 1.96 Now we can work out the value of P one hunt. That is the proportion off students who graduated in Pennsylvania. And it's given by the Fraction 980 divide by 1200 and that in decimal phone is zero point h 17 Next p too hot. The proportion of students who graduated in i down it's going to be 940 divided by 1200 and decimal form 0.783 Next, we cannot caught PBA by substituting the Bradleys, UM x one x two and one and into. So that's going to be 918 plus 914 divided by 1200 plus 1200. And when we simplify, PBA equals 0.8, Cuba will be one minus 0.8, which will be 0.2. So with this mindless, we can walk out the test of you by substituting the bodies of obtained into the formula for that. So that's going to be 0.817 minus 0.783 minus zero. She's there assumed different in proportions for the population divided by the square it off P bonds. Your 0.8 times Cuba 0.2 times The fraction one off N one is one of the wonders of 200 plus 1/1 dollars and 200 which is to. And when we simplify, we'll get that. The calculated value said is 2.0 for one. We now need to compare the completed bundles there and the critical value upset. So we find that the calculated volumes at 2.0 for one years great happen the critical value, which is 1.96 This means that the progressive Vandy offset is within the critical region, and when that happens, we make the decision to reject the now like Oh, this is and rejecting the knowledge that this is leads us to make the conclusion that there is enough evidence to support the claim that the proportions are different. So we have enough evidence from the sample to support the clean that the proportions off graduating students between the states are different.


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