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First explain what the Gini coefficient is and what hypothetical Gini values of 0 and 1 mean. Sort the data by the Gini coefficient in 2000 and look at the list of countries. Next describe the distribution of inequality across countries with a histogram and with text. Report the average Gini coefficient in 2000 and the standard deviation for all the countries in the data. Plot a scatter plot of Gini coefficients on GDP growth between 1970 and 2000, where growth is on the X-axis and gini00 is on the Y-axis. To do this, you'll have to create a new variable for this growth rate.
Then, explain the Kuznets hypothesis. What does the theory predict? Next produce a scatterplot using data from the year 2000 to determine whether the evidence in that year is consistent with the theory. (Hint: to produce this graph use the "lowess" command instead of the "scatter" command that we usually use). Does the hypothesis appear to be corroborated by the data? Explain your reasoning fully.
CASE STUDY: Are the Fish Safe to Eat? Assessing which Factors affect Mercury Levels in Fish in Maine Lakes.
Distinct random variable
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
An old saying in golf is "you drive for show and you putt for dough." The point is that good putting is more important than long driving for shooting low scores and hence winning money.
A normal distribution with a mean of 55 and a standard deviation of 6 is evaluated to solve a business problem.
Answer the following three questions based on what you know about statistics now.
She is interested in testing the null hypothesis that the mean SAT score is the same for each type of schooling using the one-way ANOVA. Some summary statistics for the three groups are given below, followed by the one-way ANOVA table.
The number of customers at a specialty meat store averages about 1500/day. The exact number varies from day to day. On Fridays before long weekends, the number of customers increases to about 3000. Which of the following statements is correct
Could mud-wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington health center wondered this when one male and six female students complained of rashes..
determine if the improvement is of practical significance one should. Crop researchers plant 100 plots with a new variety of corn. The average yield for these plots is x' = 130 bushels per acre
How large should n be so that the standard deviation of is no more than 0.01 and sampling distribution
If a blue ball is selected you win nothing. Let X be the amount that you win. The expected value of X and let the random variable X be a random number with the uniform density curve given below
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