Exam 14: Sampling and Simulation

The survey question, "Why do you think that people break laws?" is a poor survey question because it is:

Sampling methods often use random numbers to select samples.

Joe is going to play a carnival game where if you guess the correct month, you win $20.It costs $2 to play.1 represents he wins, 2-12 represents he loses. What is his expected winnings if he plays 27 times? A computer randomly generated the following numbers from 1 to 12.

A researcher wishes to use a random number table to pick between three groups labelled X, Y, and Z.X is to be chosen with a probability of 13/63, Y with a probability of 28/63, and Z with a probability of 22/63.How can the researcher assign random numbers to achieve these probabilities?

Samples are said to be ______________ when some type of systematic error has been made in the selection of the subjects. ________________________________________

A researcher is using a random number table to pick between two groups labelled X and Y.X is to be chosen with a probability of 36/56 and Y with a probability of 20/56.The researcher assigns the digits From 1 through 36 to X and the digits 37 to 56 to Y.The researcher uses this section of a random number Table: What are the first and second choices?

A new product is being introduced, and a nationwide survey to determine the public's opinion of the product is to be conducted.Four provinces are picked at random, divided into eight areas, and then A sample of these areas is divided into rural and urban markets.A number of people in each of these Markets are asked their opinion of the new product.What type of sampling technique is being employed?

There is a 5% chance that Bob will win a game and make $50.If he loses, he has to pay $5.What is his expected winnings if he plays 20 times? Use the following random numbers table.Starting with the number 74, go down the columns, continuing at the top of the next column, until 20 numbers have been chosen.

The following numbers were randomly generated.Starting with the number 97, select every other number down the columns, continuing at the top of the next column, until seven numbers have been chosen.If the odd numbers represent tails, and the even numbers represent heads, how many times does this simulated coin land on tails?

A quality control engineer is checking parts coming off an assembly line to see if they meet customer specifications.What type of sampling is being employed?

Samples are said to be biased samples when some type of systematic error has been made in the selection of the subjects.

If all possible samples of a specific size have the same chance of being selected, what type of sampling technique is being used?

Why would researchers want to use a simulation rather than study an actual situation?

The survey question, "Since everybody likes baseball, you support the construction of the new ball field, don't you?" is a poor survey question because it is:

What is the basic simulation technique called?

A researcher is using a random number table to pick between two groups labelled X and Y.X is to be chosen with a probability of 5/7 and Y with a probability of 2/7.The researcher assigns the digits {1, 2, 3, 4, 5} to X and the digits {6, 7} to Y.The researcher uses this section of a random number table: What are the first and second choices?

A six-sided die is used to simulate the favourite ice cream flavours for a simulated series of customers. Given that the following eight numbers were rolled, how many customers had the same favourite flavour As the person just in front of him?

A statistics teacher taught Introductory Statistics to a large lecture class of 200 students.She wanted to calculate the average of the first examination by selecting every eighth student's test score and finding the Average of these scores.What type of sampling technique is being employed?

A(n) __________ is defined as all subjects (human or otherwise) that are being studied. ________________________________________

A(n) ____________ is conducted when a sample of individuals is asked to respond to questions about a particular subject. ________________________________________