Reference no: EM13525642
1.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 eight student's test score and finding the average of these scores. What type of sampling technique is being employed?
2.Sampling differs from simulation in that
3.A flip of a fair coin is used to simulate the sizes of a series of simulated shirts.
Flip Size
H Medium
T Extra-Large
Given the following six flips, how many extra-large shirts were there?
H T T T H T
4.The survey question "Why do you think that people break laws?" is a poor survey question because it is
5.What term is given to a sample chosen at random from a population?
6.A six-sided die is used to simulate the favorite ice cream flavors for a simulated series of customers.
Roll Flavor
1 Vanilla
2 Vanilla
3 Chocolate
4 Chocolate
5 Strawberry
6 Mint Chocolate Chip
Given that the following eight numbers were rolled, how many customers had the same favorite flavor as the person just in front of him?
2 6 3 3 6 1 2 1
7.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
8.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?
9.A six-sided die is rolled to simulate a nine-hole round of golf.
Roll Score
1 Hole-in-one
2 Eagle
3 Birdie
4 Par
5 Bogey
6 Double-Bogey
Given that the following nine numbers were rolled, on how many holes did the golfer make par or better (hole in one, eagle, birdie, or par):
3, 1, 1, 4, 6, 5, 2, 3, 6
10.A researcher is using a random number table to pick between two groups labeled X and Y. X is to be chosen with probability 5/7 and Y with probability 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
6 9 5 6 3 6 2 3 6 1
What are the first and second choices?
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Find the frequency of the beat
: Two organ pipes, open at one end but closed at the other, are each 1.08m long. One is now lengthened by 1.20cm. Find the frequency of the beat
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Proportions instead of raw data as frequencies are called
: Thirty students recorded the colors of their eyes, choosing from the colors brown, blue, green, hazel, and black. This data can be appropriately summarized in a
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What is the mode of the following numbers
: If a student scored 74 points on a test where the mean score was 80 and the standard deviation was 6. What was the student's z-score?
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Find the weighted mean for three exams
: Find the weighted mean for three exams if the first one was worth 75 points and the student received a score of 70%, the second was worth 50 points and the student received a score of 80% and the third was worth 30 points and the student received a s..
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What type of sampling is being employed
: 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?
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What are two advantages of using simulation techniques
: A pollster wants to determine which local news channel is watched most frequently in New York City. Two city blocks in Manhattan are used as a sample. What type of sampling technique is being used?
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Researcher manipulates one of the variables
: If a researcher manipulates one of the variables and tries to determine how the manipulation influences other variables, the researcher is conducting a(n)
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Estimate the total charge on the shell
: A thin nonconducting spherical shell of radius 6 cm carries a uniform surface charge density ? = 9 nC/m2. What is the total charge on the shell
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Find what was the velocity of the elevator
: An Elevator descended from rest on the 10th floor passing the 4th floor for a total distance of 22.5m. what was the velocity of the elevator as it passed the 4th floor
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