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Q. Example of Selection a Sample?
Ans.
Suppose a presidential election is approaching and many people are interested in knowing which candidate is most likely to win the vote. You have been assigned the task of predicting the future president one month before Election Day. How do you do it?
Solution: Here is one way that you might approach this problem. Use the 4 steps listed above.
1) The objective of this survey is to determine what percent of voters are likely to vote for the republican candidate, the democratic candidate or another candidate.
2) The variable is the way each member of the population chooses to vote. The population is all of the registered American voters.
3) You may decide to randomly dial phone numbers using U.S. area codes until you find 1000 registered voters. Ask them which candidate they plan to vote for.
4) If the sample you have chosen is a good representation of the voting American public, then you might assume that the percentage of voters in your sample who chose to vote republican will be the same percentage of voters in the entire population who will vote republican. You can assume the same for the democratic candidate as well as the other candidates.
Analyze the given data using chi-square test and see if it fits the expected 9:3:3:1 F 2 phenotypic ratio. Ho: Null hypothesis: The F 2 phenotypic ratio follows the
Hierarchical Clustering Five, two-dimensional data points are shown below: x y -0.43 1.19 -1.66 1.1
how to calculate crude date rate?
To illustrate the importance of model selection. We will use only the first four observations to estimate the function f such that ini t. h = f(h. d) for two different models.
Statistical process control, a methodology used for controlling and improving the outcomes of operational processes, has been in use for almost 100 years! It was widely used in ma
Question: Students in a science class have just received their grades on the first test. The instructor has provided information about the first test grades in some previous c
A toothpaste company wants to know if its new product increases the length of time in between dentist visits for its users. The company sets a target of 180 days to determine if it
advantages an d disadvantages of various measures o f dispersion
1) Working in your groups analyse the organisation of information that the Facebook social networking site potentially uses. 2) Suggest the organisation of information and data
Clipping is one form of distortion that occurs when an amplifier is overdriven, which happens when it attempts to increase voltage or current beyond its limits. When an amplifier
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