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The rates of on-time flights for commercial jets are continuously tracked by the U.S. Department of Transportation. Recently, Southwest Air had the best rates with 80% of its flights arriving on time. A test is conducted by randomly selecting 16 Southwest flights and observing whether they arrive on time.
Find the probability that exactly 15 flights arrive on time.
We code middle-aged Americans as 1 and senior citizens as 0, the logistic regression model for senior citizens
Estimate the population mean
Subjects at both sites were classified as dropouts if they left the study before the conclusion, or completers if they finished the study
This model is fit to the data using the method of least squares using statistical software, and the following ANOVA table is obtained
The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988.
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
If you have a statistical package that computes binomial probabilities, find the probability that at least five funds outperform the market in all 10 years.
It is better to use the median rather than the mean for a distribution when:
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
What is the probability the average of the sample is more than $38000 and What is the standard deviation of the sample mean
In this paragraph, be sure to make it clear how you handled the issue of conducting three planned comparisons. Also provide the ANOVA summary table for these results.
Compute lower and upper quartiles of log10-balances? Determine 95% range of the balances in $s? Express in English what the two boundaries mean.
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