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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.
Court-ordered withholdings Paycheck accounting also includes withholdings for items other than payroll taxation. For example, legal courts of law may purchase business employer
1. Name several entities, attributes, activities, events, and state variables for the following systems: (a) A cafeteria (b) A grocery store (c) A laundromat (d) A fast
log4(4/16x+4)=54
Back to the workshop the previous problem but assuming that in each of the three stages of development, there is a certain probability that a major defect is detected. When such a
what are the projects elctromagnetic induction?
The results of a study using focused comparison techniques showed that two independent variables distinguished between successful and unsuccessful negotiations with the US on secur
a business was started on January 1, 2011 and $1000 of supplies to use in the business. At the end of the month 25% of the supplies remains unpaid and 20% are still on hand. what a
systolic blood pressure in different age groups. the following table contains a random sample of 40 women partitioned into three groups...
). Calculate Karl Pearson’s coefficient of correlation from the following data , using 20 as the working mean for price and 70 as the working mean for demand: Price: 14 16 17 18 1
Mention the characteristics of Statistics. Explain any two applications of Statistics.
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