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Assignment
1. For each variable in the data set provided, classify the variable as Nominal, Ordinal, Interval or Ratio. Explain why you made the decision for each.
2. Find the Mean, Standard Deviation, and Range for The Salary variable for the entire data set and for the male and females separately.
3. Find the first, second, and third quartiles and the interquartile range for the entire data set, the males and females separately. Compare the results of the male and females and comment on the results.
4. To test if the data is approximately normal, use the empirical rule for the normal distribution. Find the percentage of male salaries within one, two, and three standard deviation of the mean. Compare the percentages to those predicted by the empirical rule for the normal distribution. Repeat the calculations for the female salaries. Comment on the results.
The dependent variable was the women's rating of the discussion. Analyze the ratings using the techniques in this chapter (high scores favorable ratings). Write an interpretation.
Use a graphical technique to compare the divorce rates in 1992, 2008 and 2012 broken down by age for Australian Male. Describe your graph.
a research team conducted a study showing that approximately 10 of all businessmen who wear ties wear them so tightly
An urn contains w white chips, b black chips, and r red chips. The chips are drawn out at random, one at a time, with replacement. What is the probability that a white appears before a red?
If the mailing list can be considered a random sample of the population, what is the chance that at least 1245 Macintosh users will receive the flyer?
The following data are based on information from Domestic affairs. Let X be the average number of employees in a group helh insurance plan, and let Y be the average administrative cost as a percentage of claims.
a. What is the probability that a randomly selected juror has an IQ score below 120?
The sampling plan is perhaps the single most important aspect of generalizing research findings beyond the study sample. In a quantitative research study, what method of sampling allows for the greater generalization of findings?
A department store, on average, has daily sales of $28,707.47. The standard deviation of sales is $1000. On Tuesday, the store sold $34,650.77 worth of goods. Find Tuesday's z score. Was Tuesday an unusually good day?
an election ballot asks voters to select 6 city commissioners from a group of 18 canidates. in how many ways can this
Also, the sample data appear to have a bell-shaped distribution. Construct the 95% confidence interval for the mean time spent on paperwork by all managers.
The Normal distribution with mean μ= 25.0 and standard deviation σ=6.4 is a good description of the total score on the Medical College Admission Test (MCAT). This is a continuous probability model for the score of a randomly chosen student. Call t..
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