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You are the operations for American Airlines and you are considering a higher fare level for passengers in aisle seats. You want to estimate the percentage of passengers who now prefer aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 95% confident that the sample percentage is within 2.5 percentage points of the true population percentage. Assume that nothing is known about the percentage of passengers who prefer aisle seats.
What is the test statistic for sample of size 26, mean 14.90, and standard deviation 1.20? Enter the test statistic with 2 decimal places.
Add the 5% significance level, has there been an increase in production? What is alternative hypothesis and p-value?
Suppose that if a presidential election were held today, 53% of all voters would vote for Obama over McCain.
Twins. Twins are often born after a pregnancy that lasts less than 9 months. The graph from the Journal of the American Medical Association (JAMA).
Plot the relationship between average verbal (Verbal) and average math (Math) SAT scores in the 50 states. Describe the characteristics of the relationship.
A study found that women of normal weight missed an average of 3.4 days of work due to illness during the preceding year, compared to an average of 5.2 days for women who were considered overweight.- Determine and interpret the p-value for the test..
Why does day light savings occur and what day does it start?
Post a message in the Discussion area that answers the following question. Do you think the person has ESP or can their success ratio be attributed to chance variation?
The expected dividend and the growth on dividends are $ 2.50 per share and 5% respectively. If the flotation cost is 9% of the issue's gross proceeds
the comfort widget company makes several different sized widgets. the smallest widget the manufactures has a mean
What are the differences between a two sample t-test and ANOVA hypothesis testing? When would you use ANOVA at your place of employment, in your education, or in politics?
There are two manufacturing processes, old and new, that produce the same product. The defect rate has been measured for a number of days for each process.
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