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1. A social scientist would like to use a pictogram in comparing the number of violent crimes against persons in 2006 with the comparable figure for 1960. Consider- ing that she can select from a wide variety of symbols to demonstrate these frequencies, suggest several possible symbols that would tend to underscore the violence and/ or human tragedy of such crimes.
(DATA SET) Note: Exercises 2.64-2.72 require a computer and statistical software.
2. If possible with your statistical software, construct a dotplot for the data of Exercise 2.56 (use data fileXR02056). Are there any cities for which the record high temperature is so high that it would appear to be an outlier? If so, which one(s)?
In a recent study of 86 working adults, the mean number of hours per week spent talking on the phone was 21.6. The sd= 5.7 hours.
Does lovastatin (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study,researchers gave lovastatin to 2,325 people and an inactive substitute to 2,081 people
the file contains the amount that a sample of nine customers spent for lunch at a fast-food restaurant4.2 5.03 5.86
Perform a chi-square test on the following data (a) Regulation is the best way to ensure a safe workplace.
an experiment is conducted in which 60 participants each fill out a personality test but not according to the way they
you are going to select 6 players for a volleyball team from a group of 13 players. how many possible teams can be
What is the probability that a worker chosen at random will have an age greater than or equal to 30 and less than or equal to 39?
A polling organization plans to sample 1000 adult Americans to estimate the proportion of Americans who think crime is a serious problem in this country. (a) What is the parameter of interest to the polling organization? (b) What will be the stati..
for a standard normal curve find the z-score that separates the bottom 90 from the top
suppose we draw k cards out of a deck. what is the probability that we do not draw an ace? is the answer larger or
Suppose that four American adults are asked if they ate at table-service restaurants last week. What is the probability that all of them say yes?
Assert with probability of at least 0.95 that the error of her estimate will not exceed 0.07. How large a sample, n, will she require if she has no idea what the true proportion is.
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