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Question 111ptsDetermine whether the given study is an observational study or an experiment:In a clinical trial, 780 participants suffering from high blood pressure...

Question

Question 111ptsDetermine whether the given study is an observational study or an experiment:In a clinical trial, 780 participants suffering from high blood pressure were randomly assigned to one of three groups: Over one-month period, the first group received the experimental drug; the second group received placebo, and the third group received no treatment: The diastolic blood pressure of each participant was measured at the beginning and: at theend of the period and the change in blood pressur

Question 11 1pts Determine whether the given study is an observational study or an experiment: In a clinical trial, 780 participants suffering from high blood pressure were randomly assigned to one of three groups: Over one-month period, the first group received the experimental drug; the second group received placebo, and the third group received no treatment: The diastolic blood pressure of each participant was measured at the beginning and: at theend of the period and the change in blood pressure was recorded The average change in blood pressure was calculated for each of the three groups and the three averages were compared: Observational study Experiment Neither an observational study nor an experiment



Answers

7–16. What’s the design? Read each brief report of statistical research, and identify
a) whether it was an observational study or an experiment. If it was an observational study, identify (if possible)
b) whether it was retrospective or prospective.
c) the subjects studied and how they were selected.
d) the parameter of interest.
e) the nature and scope of the conclusion the study can reach.
If it was an experiment, identify (if possible)
b) the subjects studied.
c) the factor(s) in the experiment and the number of
levels for each.
d) the number of treatments.
e) the response variable measured.
f) the design (completely randomized, blocked, or matched).
g) whether it was blind (or double-blind).
h) the nature and scope of the conclusion the experiment can reach.
Hypertension In a test of roughly 200 older men and women, those with moderately high blood pressure (averaging 164/89 mm Hg) did worse on tests of memory and reaction time than those with normal blood pressure. (Hypertension 36 [2000]: 1079)

In this question. If you wanted to determine whether this study is an experimental and observational study, and then he was also identify what is wrong with you? A medical researcher tested for a difference in systolic blood pressure levels between male and female students who are 12 years of age. She randomly selected four males and four females for a study. This is an observation story, first of all, because she's not trying toe modify the subject. So it is possible that this is an observational study. This is an observational study and observational study. The next thing is, we can see that the problem here is that the sample size is very small. What is the sample Tachira WC occurred four males and four females Examples that is very small. This is the problem with this.

The following is a solution for number 27. This looks at the mean systolic blood pressure being less than 100 and 30 for a certain floor for like a nursing student. And first we look to see if the conditions for inference have been met and you're given a normal probability plot. Um Mhm. Uh huh. I did not mean to do that. Sorry, normal probability plot. So uh this is what it kind of looks like in your books. You don't have to do that, but as long as it's linear, then we can assume normality. So that's one condition for inference and then the other one is a box plot and that kind of tells us if there are any outliers or skew nous. So this is what it kind of looks like for you and this definitely does not have any outliers. There are no stars on the outside. And then that really looks pretty darn good to me. That median is basically smack dab in the middle, maybe a little bit left skewed, but for the most part, the conditions for inference of Metz of the normal probability plot, it's linear. So we can assume normality and the box plot, it's free of outliers or really any type of skew as well. So they actually did a mini tab print out where the test statistic is negative 1.41 and a p value of 0.88. So it asked us what are the hypotheses and you don't have to use the context clues here in your original prompt, but h not is mu equals 1 30. And it says less than for the alternative. Some use less than 130 because that's what this nursing patient patient. Uh Thanks. And then it says identify the P value. There it is .088. That's just it's his pee pee. And that's the p value. So .088. And will the nurse rejected? 5? no P value is greater than alpha so failed to reject. Okay. So the conclusion here would be that there is not sufficient evidence to say that The blood pressure the average blood pressure is less than 1:30 on our floor. So not enough evidence to suggest the average. What pressure? All right. Blood pressure on her floor is less than 130.

In this exercise, we're going to be considering a hypothesis test that has been proposed. And for this test, we're going to do a few things number one, we're going to identify the variable. Then we're going to give the two populations population one and two um specify or define the mean for each population. And then also state the non hypothesis and the hypnotic and the alternative hypothesis. And finally uh classified the hypothesis test as two tailed, left tailed or writes tales. No. In this problem, we are considering the Children of diabetic mothers. And the hypothesis test is to decide whether the mean systolic blood pressure of oh D. M. That is diabetic mothers, adolescents exit that of uh oh and M. That is non diabetic mothers, adolescents. Okay, so the variable here is the systolic blood pressure. So that would be the first thing we need to right there for the variable systolic blood pressure. And for the population, we are considering adult lessons that our offspring of diabetic mothers for the first population. So that would be um or D. M. Adolescents. And for the second population population too, we are going to be considering the adolescents that are offspring of a non diabetic mothers. So that's all. And them with their lessons. Next, we shall be defining new one and mewtwo. The population means for the two populations. So a new one uh is going to represent is going to be defined by the the mean systolic blood pressures of ODM adolescents. And mewtwo is the mean systolic blood pressure of who? N. M. Adolescents. Next, the null and alternative hypotheses in the question, the hypothesis is testing to decide whether the means, the systolic blood pressure of OdM adolescents, eggs, seeds that of O. N. M. And we listen. So the null hypothesis that new one is equal to um Youtube. And the alternative hypothesis is me one is greater than mute, too, because of the white exits, so that means greater than and this is since we're using the symbol greater than this is going to be a right tailed test. Mhm.

The answer to this question is experiment, since the Observer changes something about Group One and then records and see if the differences between Group one and group to see if that


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