12.The probability that a person tested positive on a screening test given that he/she has a disease is called the Sensitivity Specificity Negative predictive value Positive predictive value 16If a z score = 2.5, it is _____ standard deviations above the mean 1 -2.5 3 2. 5 17The normal curve represents a distribution where mode=0. What is the value of mean 1 0. 5 0 None of the above 18 The function that defines the probability distribution of a continuous random variable is a normal density function binomial probability function either normal or binomial depending on the situation probability density function 19The normal approximation to the binomial distribution is most useful for finding which of the following? The probability P(X = 2) when X is a binomial random variable with large n The probability P(X 2) when X is a binomial random variable with large n. The probability P(X = 2) when X is a normal random variable with small n The probability P(X 2) when X is a normal random variable with small n 20.The probability distribution of the sample mean is called the central probability distribution sampling distribution of the mean random variation standard error 21.Why is the Central Limit Theorem so important to the study of sampling distributions? It allows normal. It allows It allows It allows us to disregard the size of the sample selected when the population is approximately us to disregard the shape of the sampling distribution when the size of the population is large. us to disregard the size of the population we are sampling from. us to disregard the shape of the population when sample size n is large. 22.A population consists of 200 elements. We want to draw a simple random sample of 40 elements from this population. On the first selection, the probability of an element being selected is 0. 2 0. 5 0.00 5 0.00 2 23.Whenever the population has a normal probability distribution, the sampling distribution of sample mean is a normal probability distribution for only large sample sizes only small sample sizes any sample size only samples of size thirty or greater 24.When using a sample to estimate the average height of a population of men, the standard error of the mean height would be greater in which of the following studies? A study with 100 men A study with 500 men A study with 600 men All would have the same sampling variation for the mean 25.Suppose we want to study the weekly rate of alcohol drinking among USF undergraduate students. Which of the following would be the LEAST preferred method of randomly selecting participants? Selecting hall Selecting office Selecting month Selecting college a random sample of students from each residence a random sample of students from the list of all undergraduate students from the university's registrar a random sample of students who have used the university health services in the past a random sample of students from each