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Discussion Post: Measures of Center & Variability
Respond to the following in a minimum of 175 words:
I. Discuss the concepts of mean, median, mode, and standard deviation. Include when each should be used and evaluate the differences of each. How can knowing this information about data help us?
II. Describe 1 example from your own personal or professional experiences using either measures of center (i.e., mean, median, or mode) or standard deviation. Discuss how knowing that information helped you.
Choose a person from the United States and a person from Ireland at random, independently of each other. What is the probability that both have type O blood? What is the probability that both have the same blood type?
Do these results suggest that the racial makeup of the faculty members is different from that of the students? (Use the .05 significance level.)
As discussed in Section 4.3, the algorithm in Figure 4.4 could use left or right-recursion to transform a repeated sequence of symbols into standard grammar form.
What minimum sample size will be required if they want to be 99% confident that the sample proportion will not differ from the true population proportion by more than 5%?
Determine a 95% confidence interval for the population mean.
Discuss in detail how surveys can be used as a data collection method in quantitative research studies and in qualitative research studies.
you are picking a bouquet of 20 flowers for your mother at random from a garden with 25 conflowers 35 daisies and 42
europeans are increasingly upset at their leaders for making deep budget cuts to many social programs that are becoming
As the prices of heating oil and natural gas increase, consumers become more careful about heating their homes. Researchers want to know how warm home- owners keep their houses in January and how the results from Wisconsin and Tennessee compare.
Determine the 90% prediction interval for the calculus final exam score for an entering freshman who scored 70 on the math proficiency test and 500 on the quantitative portion of the SAT.
You have an investment of $100,000 in the fund. How do you interpret the portfolio manager's announcement?
Given the regression equation Y = 2.6 + .02X the constant or intercept is: (a) .02X (b) 2.6 above zero on the X axis
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