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For example, in experiments with animals and sex as a factor, the experimenter has no way to ensure that the animals available are a random sample from all animals of each sex. Typically, for small rodents such a mice, the animals are ordered from a supply company, housed in an animal care facility not under the direct control of the experimenter, and are supplied on an as-needed basis. All than can be done is typically hope for the best. What is the actual population of interest? All animals of that sex? All animals of that sex born in a particular year? All animals of that sex born in that year for that particular supply company?
The mean number of books each professor has. How many professors must the anthropologist sample to obtain an average accurate to within 14 books per professor?
Compute a 95% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24 and 59. Change the number from 59 to 24 and recalculate the confidence interval.
The mean time to download an Google video is 1 minute 30 seconds. Suppose the download time is normally distributed with standard deviation of 20 seconds.
If you had a research problem appropriate for ANOVA and it was based on the results from three samples, what would be the null hypothesis?
How do the graphical and computer-based methods of solving LP problems differ? In what ways are they the same? Under what circumstances would you prefer to use the graphical approach?
The following indices: z, t, F, r, Chi square. Using the data below, show that analyses using each of the three statistics yields the same or similar outcomes.
Gigi has rolled a natural on four straight tosses of the dice. This excites the gamblers standing around the table.
The finished subassembly two must be inspected. A list of activities, their predecessors, and their durations is given in the following Table.
Normal distribution with mean $60,000 and standard deviation $8000. Four electricians are selected at random from this population to be shipped to another region.
What is the underlying difference between the T-test and the Z-test? Provide an example of nominal information and write a work related survey question that would collect nominal data:
The letters of the word PRESERVE are arranged at random. Then what is the probability that all the 3 E's occur together??
Service times are exponentially distributed and average 24 per hour. Customers that arrive when all seats are taken do not enter the diner. The probability that there are no customers in the diner is?
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