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A random sample of 56 departing flights at an airport over a 3-month period had a mean wait of 14.2 minutes between boarding and takeoff, with a standard deviation of 4.53 minutes. At the same airport, a random sample of 81 incoming flights over the same 3-month period had a mean wait of 17.5 minutes between the time that the plane arrived at the gate and the time that the baggage reached the baggage claim area, with a standard deviation of 9.87 minutes. At the 0.05 level of significance, test the claim that at this airport the mean wait for takeoff is less than the mean wait for baggage
As a bonus, students are encouraged to research new and interesting articles/ websites/ interactive tools, etc. which are pertinent to the class material.
The null hypothesis is that there was no change in average liquor consumption. State this formally in terms of µ.
A coin tossed 100 times and 530 heads appear. At a=0.05, test the claim that this is a non biased coin. Use a P-Value. does this suggest the coin is fair?
What is the relationship between descriptive statistics and Affirmative Action ? Can using probability in market trending decisions lead to a bad decision? Explain?
Suppose 70% of kids who visit a doctor have a fever, and 25% of kids witha fever have sore throats. What's the probability that a kid who goes to the doctor has a fever and a sore throat?
Mattel Corporation produces a remote-controlled car that requires three AA batteries. The mean life of these batteries in this product is 35 hours with a standard deviation of 5.5 hours. As part of its testing program Sony tests samples of 16 batt..
The data comes from a set of scores on a 50 point Bilogy 101 test. 90 subjects took the test. The scores range from 12-50. How to make a simple frequency distribution table, using the raw data?
Find out a linear equation in the form P = mt + b (y = mx + b) that gives the population, P, t years from 2010.
A survey of 600 non-fatal accidents showed 259 involved the use of a cell phone. Construct a 99% confidence interval for the proportion of fatal accidents that involved the use of a cell phone?
The Gallup organization conducted a telephone survey with a random selected national sample of 1005 adults, 18 years and older. The survey asked the respondents, "How would you describe your own physical health at this time? "Response categories w..
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
What if the size for each sample were increased to 20? Would a sample mean of 115 or more be considered unusual? Why or why not? Why is the Central Limit Theorem used?
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