Select the term that best fits this definition: The sample size is large enough that the central limit theorem is a requirement for distributions of means

A sample of 2500 patients were taken to assess a medical test.  27% of the sample have the disease, 563 patients have the disease and tested negative, and 235 patients do not have the disease and tested negative. What is the probability someone has the disease if it is known they have a positive test?  (round your answer to 4 decimal places)

Ethnicity of USF students is

The probability that a person tested positive on a screening test given that he/she has a disease is called the

A sample of 1000 subjects is stratified gender and physical activity level as follows:   Physical Activity Level Gender Low High Total Male 200 500 700 Female 100 200 300 Total 300 700 1000   In a random selection of a subject from the study population, what is the probability that the person is female?

In a study on the effect of maternal exposure to cigarettes on the risk of preterm birth, the number of preterm births occurring among 130 women who smoked during pregnancy between 2010 and 2012 was compared to the number of preterm births among 192 women who did not smoke during pregnancy during the same time period. In a second study, the pregnancy medical records of 55 women who gave birth to premature infants were compared to those of 98 women who did not have a premature infant in order to assess if the women smoked during pregnancy.Which of the following statements is correct?

A graduate student is registering for 3 courses in one semester. X=the number of courses that are full at the time of registration.  The random variable X has a probability distribution as follows x 0 1 2 3 p(x) 0.45 0.25 0.20 0.10 The probability that more than two of the classes are full at the time of registration P(X >2) is equal to

Four hundred women are enrolled in a study to evaluate the accuracy of a test for pregnancy. 200 of the women were actually pregnant. 170 of the pregnant women had a positive test as did 40 of the women who were not pregnant. What is the probability (i.e., PPV) that a woman is pregnant given that she tested positive on a screening test? Test                         Pregnant? Yes No Total + 170 40 210 – 30 160 190 Total 200 200 400

Select statement below that is true about correlations.

A graduate student is registering for 3 courses in one semester. X=the number of courses that are full at the time of registration.  The random variable X has a probability distribution as follows x 0 1 2 3 p(x) 0.55 0.25 0.15 0.05 The probability that less than one of the classes are full at the time of registration is equal to