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Airline Travelers often choose which airport to fly from based on flight cost. Cost data (in dollars) for a sample of flights to eight cities from Dayton, Ohio, and Louisville, Kentucky, were collected to help determine which of the two airports was more costly to fly from. A researcher argued that it is significantly more costly to fly out of Dayton than Louisville. Use the sample data to see whether they support the researcher's argument. Use a=.05 as the level of significance.
Destination Dayton Louisville
Chicago-O'Hare 319 142
Grand Rapids, Michigan 192 213
Portland, Oregon 503 317
Atlanta 256 387
Seattle 339 317
South Bend, Indiana 379 167
Miami 268 273
Dallas-Ft.Worth 288 274
Suppose you conduct survey asking people if they support something or if they like some product or if they watch some TV-show.
Develop a p chart with 3-sigma control limits and evaluate whether the process is in statistical control
What are the differences between a two sample t-test and ANOVA hypothesis testing? What is an example of a research idea that would need to be analyzed using an ANOVA?
By using standard normal table, determine critical value (or values) for= 0.14 right-tailed test.
Far separated sample means + differences of sample means are large compared to their internal (within) variability! Which of the following examples indicate group diff"s are "large"?
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
What would that evaluation be and what is the margin of error?
In an article in the Journal of Management Information Systems, Mahmood and Mann investigate how information technology (IT) investment relates to company performance.
Consider a random sample of six families who are asked if their children have an influence on their vacation destination.
If we are dealing with non-normal data we use Chebychev's Theorem. While not as precise, it does provide some level of utility. If we use Chebychev
Will you reject your null hypothesis that all population means are equal or will you not reject? Choose the best answer from the options below.
It was thought that hypnosis would lower a person's desire to smoke. A researcher decided to investigate this hypothesis using a paired-sample sign test in which the number of cigarettes/day smoked by subjects was recorded before and after hypnosi..
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