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1) A sample of 100 flights for united airlines shows that 64 are on time. A sample of 100 flights for american shows that 80 were on time. Using these figures execute a hypothesis test at alpha=0.05 that there is no difference in the performance of the two airlines.
That is, test the hypothesis that the proportion of on-time flights is the same for both airlines vs. that there is difference in on-time porportion.
Specify Ho and Ha, show the p-value, state whether you reject Ho or not and state your general conclusion.
A mean of 116 and a standard deviation of 4.8. If 36 people are randomly selected, find that probability that their mean blood pressure will be less than 118.
Find the probability taht exactly 6 are satisifed with the airlines. Find the probability that fewer than 4 are satisfied with the airlines. Find the probability that 5 or more are satisfied with the airlines. Find the probability that between 3 a..
a pet supplier has a stock at parakeets of which 10 are blue parakeets. a pet store orders 3 parakeets from this
the amount of time it takes anyone to figure out who the killer is in a one- hour episode of columbo is normally
Compare equations with one variable to equations with two variables. How are they alike? How are they different? What if an equation had three variables?
Create the 90% confidence interval for mean score of all such subjects. You may suppose scores are usually distributed.
Find the mean and standard error of the sample means that is normally distributed with a mean of 10 and a standard deviation of 2 and a sample size of 25.
q1 is the gender of a nurse related to the specialty he or she chooses?? a hospital administrator counted the number of
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the national association of realtors released a survey indicating that a surprising 43 of first-time home buyers
What is the estimate of the proporation of employees who do not use the ATM in a month? Develop a 95 percent confidence interval for the mean number of transactions per month.
Explain and give an example of: z-tests, t-tests, single sample t-tests, a dependent sample t-test, or an independent sample t-test.
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