Identify the sampling techniques used in each scenario. a. To ensure the quality of its products, accompany tests every 15th item off the assembly line. Identify the sampling techniques used in each scenario. b. A student committee in the biology department was formed by randomly choosing 3 biology measures from every level of students, that is first year, second year, third year... etc.

Let's examine the mean of the numbers 1, 2, 3, 4, 5, 6, 7, and 8 by drawing samples from these values, calculating the mean of each sample, and then considering the sampling distribution of the mean. To do this, suppose you perform an experiment in which you roll an eight-sided die two times (or equivalently, roll two eight-sided dice one time) and calculate the mean of your sample. Remember that your population is the numbers 1, 2, 3, 4, 5, 6, 7, and 8. The true mean (µ) of the numbers 1, 2, 3, 4, 5, 6, 7, and 8 is , and the true standard deviation (o) is The number of possible different samples (each of size n = 2) is the number of possibilities on the first roll (8) times the number of possibilities on the second roll (also 8), or 8(8) = 64. If you collected all of these possible samples, the mean of your sampling distribution of means (µM) would equal and the standard deviation of your sampling distribution of means (that is, the standard error or ɑm) would be The following chart…

Knowing that you need a sample pool of 536 students to ultimately get about 250 students in your sample, you are in position to draw a systematic sample from the student directory at your university. Further, 5,000 students are listed in the directory. What is the sampling interval?

Our local movie theater polls its customers about their favorite candy to eat during the movie.  Name each sampling method described. a.  Employees ask every 45th customer that purchases a movie ticket b.  An employee divides the theater into sections: left, right, front, back.  He/she randomly chooses a section and polls every customer within that section