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Say which level of measure (interval, ordinal, ratio, nominal) is being used and state the center measures that could be used for each of the following:
a. Marital status (single, married, divorced, widowed) of applicants - nominal
b. Distance between two cities - ratio
c. Water temperature measured Fahrenheit - interval
d. Evaluation of performance by poor, fair, good, excellent - ordinal
The pie chart summarizes the genres of 120 first-run movies released in 2005.- Is this an appropriate display for the genres? Why/why not?- Which genre was least common?
Using the data presented by Hand and colleagues (1994) and discussed in previous chapters, we would like to estimate the average age difference.
A half-liter bottle of soft drink is supposed to contain a mean of 520 ml. The filling process follows a normal distribution with a known process standard deviation of 4 ml.
Question 24: Which of the following statistics is not a measure of central location? (a) Mean (b) Median (c) Mode (d) Interquartile range
Describe the influence of race, ethnicity, gender, and socioeconomic status in political participation.
Smoking and sex. Wan, Friedman, Boutros, and Crawford (2008) studied a possible link between smoking and certain personality traits by sex.
1.a company is studying their processes and for one of them the acidity of the mixture is critical. they have obtained
With 90% confidence, compute the maximum error between the sample average of the 49 radii measurements of the previous problem and the true average radius.
a. State the appropriate hypotheses for your significance test. b. Use the sample results to compute the test statistic and the p-value.
Plot the standardized residuals against A (if you are using a computer for your calculations, also produce a normal probability plot of the standardized.
Find the variance and standard deviation for the two distributions above. Compare the variation of the data sets. Decide if one data set is more variable than the other.
According to Berford's law, a variety of different data sets includes numbers with leading (first) digits that follow the distribution shown in the nine row of Table 1. The bottom row lists the frequencies of leading digits of the populations of a..
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