How many of the people will test positive for two tests? A+B+, A+C, B+C+?
Ans
A+B
Total test positive will be sum of A and B
How many of the people will test positive for two tests? A+B+, A+C, B+C+?
Among the 1,240 people with CRC, how many will test positive on each of the two tests (Sensa and ICT)?
we are conducting many hypothesis tests to test a claim. Approximately how many of the tests will yield significant results by chance, if the null hypothesis is true? a. 600 tests using a significance level of 5%. b. 70 tests using a significance level of 10%.
1. A two-way ANOVA tests how many main effects? a) 0 b) 1 c) 2 d) It depends on the study 2. A two-way ANOVA tests how many interactions? a) 0 b) 1 c) 2 d) It depends on the study
The proportion of people in a given community who have a certain disease is 0.005. A test is available to diagnose the disease. If a person has the disease, the probability that the test will produce a positive signal is 0.99. If a person does not have the disease, the probability that the test will produce a positive signal is 0.01 a. If a person tests positive, what is the probability that the person has the disease? b. If a...
If the correlation between half-tests of a 12-item test is 0.65, how many items will be needed for the test to have a reliability of 0.8?
Many organizations use multiple tests or assessments in their selection plan. There are essentially two approaches to evaluating candidates using multiple assessments: the multiple hurdle approach and a compensatory model. First, passing or "cut" scores need to be set for each test or assessment. These can be set high or low, depending on whether you'd rather hire: More people who are less qualified – with a cut score of 60% or higher, most people will probably pass the test. Fewer...
1. A certain drug test has a 10% false positive rate (a positive test even if the person has not used that drug) and a 15% false negative rate (a negative test despite the person using the drug). It is known that approximately95% of people do not use the drug being tested for. If 10,000 people are given the test, complete the table with the expected results and then answer the following questions. Test Results Positive Negative Total No Drug...
Do you like taking tests? Do you feel anxious before a test? Most people do. Tests mean “being tested,” after all. How can you cut text anxiety – use it as a motivational tool? Or Do you have a good memory? Why or why not? Do you wish you could remember more? Why?
In this exercise, we are conducting many hypothesis tests to test a claim. Assume that the null hypothesis is true. If 400 tests are conducted using a significance level of 2 % , approximately how many of the tests will incorrectly find significance?
In this exercise, we are conducting many hypothesis tests to test a claim. Assume that the null hypothesis is true. If 40 tests are conducted using a significance level of 10% approximately how many of the tests will incorrectly find significance?