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1. A Department of Transportation report about air travel found that nationwide, 76% of all flights are on time. Base the following questions on 125 randomly selected flights. You may assume the only outcomes are that a flight is either late or is on time. (For all probabilities round to tenth of a percent)
a) How many flights would you expect to be late?
b) Calculate the standard deviation? (round to hundredths)
c) What is the probability you will have exactly 80 flights on time?
d) What is the probability you will have 20 or
It's demand curve for the product is expressed as Q= 5000- 25P where Q is the number of vacuum cleaners per year and P is in dollars.
Scatter plot, Correlation coefficient and Regression equation - Do a complete regression analysis by performing the steps below
A psychologist believed that as children get older, they engage in more "inactive activities" such as playing computer games, watching TV, and surfing online.
hypothesis testing show all steps. null and alternate hypothesis diagram critical value test statistic reject or do not
From the class of all triangles one is selected at random. What is the probability that it is obtuse?
Different methods - a traditional method, and a web-based self-paced method. Can he conclude, at α = .05, that the test scores in the web-based self-paced method are lower?
What is the probability that a random sample of 49 different one-hour shopping periods will yield a sample mean between 441 and 446 shoppers and what effect will this have on the standard error of the mean?
Based on the expected return, would you rather invest your money in the stock market or in gold? Why?
Revealing information. 886 randomly sampled teens were asked which of several personal items of information they thought it okay to share with someone.
question according to the u.s. bureau of labor statistics 75 of the women 25 through 49 of age participate in the
Robert Smith of the "Merrill Lynch Pierce Fenner & Smith" families is engaged in full-time fundraising. He has been quite successful at this because he brings a very structured approach to the process:
is lack of sleep causing traffic fatalities? a study conducted under the auspices of the national highway traffic
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