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Before the recession, job-creating cities in the Sunbelt, like Las Vegas, Phoenix, and Orlando saw their populations, income levels, and housing prices surge. Las Vegas, however, offered something that often eluded these other cities: upward mobility for the working class. For example, hard-working hotel maids were able to prosper during the boom times. According to the Bureau of Labor Statistics (BLS), the average hourly rate for hotel maids was $14.25 in Las Vegas, versus $9.25 in Phoenix and $8.84 in Orlando (The Wall Street Journal, July 20, 2009). Suppose the following summary statistics and ANOVA table were produced for a = 0.05 from a sample of hourly wages of 25 hotel maids in each city.
a. At the 5% significance level, do mean hourly rates for hotel maids differ between the three cities?
b. If differences exist, use Tukey's method to determine which cities' mean hourly rates differ at the 5% significance level.
If the claim says that the population mean is greater than 200 and the sample mean is 215, we can say that the claim is true even without a formal test.
Ancient Greece was unique in the ancient world because many city-states, colonies from the mainland, were founded all along the Mediterranean and Black Sea.
questiona search the internet for the latest figures you can find on the age and sex of the australian population.b
What is the probability a random families bill is more than $550 25.12% 74.86% 15.26% 24.86 %?
let w1 and w2 be independent geometric random variables with parameters 0.2 and 0.4.
Never forget that even small effects can be statistically significant if the samples are large. Of 148 small businesses, 106 were headed by men and 42 were headed by women.
1. suppose an experiment has five equally likely outcomes e1 e2 e3 e4 e5. assign probabilities to each outcome and
The first 10 payments will be paid regardless of whether the annuitant is alive or not. Find a formula for the single premium.
In the past HR uses an average of 25 vacation days per worker in order to make available man-hour and payroll predictions. Is there evidence to show that the number of vacation days decreased over the past year? Use alpha = .05
find out whether there is a difference in the mean sales for cola stacked at the four locations in the stores. Use the .05 Significance level
A given data value has a Z-value equal to 1.2. Assuming a normal (i.e., symmetrical) continuous probability distribution, how many standard deviations is the data value from the mean?
a let x and y be independent random variables with moment generating functions ft and gt respectively. let zxy.
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