Name That Scenario: Cl or HT and which parameter(s)? Below are a number of resea

Question

Name That Scenario: Cl or HT and which parameter(s)? Below are a number of research problems. For each, first determine and select if the appropriate method to address the problem would be to make a confidence interval (CI) or to conduct a test of hypotheses (HT). Next, select the appropriate notation for the corresponding parameter(s). As a challenge for yourself: think about what would be the appropriate corresponding formula for creating the interval estimate (if Cl) or for computing the test statistic (if HT). Question 9 Subquestions A yoga instructor is working on a project in which some high school (HS) students participated in a yoga course during their last semester in HS. The length of time (minutes) that a student could correctly hold a certain yoga pose was collected at the start of the course and then at the end. The instructor wanted to determine whether or not yoga skills for this pose improve on average (where improvement implies they could hold the correct pose longer and improvement was measured as Time at End less Time at Start.) point(s) make a confidence interval (CI) conduct a test of hypotheses (HT) p1 -P2 1, 2, 3 9.b Researchers want to estimate the value of the proportion of a certain type of tree growing in a national forest that suffers from a disease. They take a representative sample of 200 of the trees from around the forest, test them, and find that 15 of them have the disease point(s) make a confidence interval (CI) conduct a test of hypotheses (HT) p1-P2 1, 2, 3

Explanation / Answer

9.A

here the answer is d as we have to test the significance of difference as it is less than zero or not here and we will conduct to test an hypotheis here.

9.B

Here we will make a confidence interval to find the true proportion of trees that have disease

so we will find p and then construct a confidence interval.

9.C

Here we will do an ANOVA hypothesis test on checking the difference of the means 1 , 2, 3

so hypothesis testing with three population mean shall be performed.

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