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1. Suppose you hear an "old-timer" say, "Why, in my day, kids were much more respectful and didn't cause as much trouble as they do nowadays!" Formulate a hypothesis related to this statement that you could test. How would you test it?
2. Researchers routinely choose an ◊-level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower level (e.g., 0.01)? What are some situations in which you might accept a higher level (e.g., 0.1)?
3. How large would your population have to be for a sample to be appropriate (i.e., rather than measuring the whole population)?
What is the probability that between 90 and 100 employers provide a two-day paid Thanksgiving holiday? That is, what is the ?
Is this sample sufficient to conclude that the eye-spots have a significant influence on the birds' behavior? Use a two-tailed test with α= .05. Compute the estimated Cohen's d to measure the size of the treatment effect.
If die is loaded so that 6 comes up with probability 0.2 and probabilities of 2,3,4, and 5 faces are not affected, determine the assignment of probabilities to the six faces?
Find the probability of drawing either a king or a spade in a single draw from a pack of 52 playing cards.
How much time should be allowed if we wish to ensure that at least 9 out of 10 students (on average) can complete it? (round to the nearest minute).
The Bee line Café is well known for its popular homemade ice cream, which it makes in a small plant in back of the café. People drive long distance to buy the ice cream.
The password of 52 digit sequence is made. It consists of 0 and 1. How various different possibilities exist for networks password.
Population of following N=5 scores: 0,6,4,3, and 12. Calculate μ and σ for the population. Determine the z-score for each score in the population.
In the mid-1990s, Colgate-Palmolive had developed a new toothpaste for the U.S. market, Colgate Total, with an antibacterial ingredient that was already being successfully sold overseas.
The frequency distribution below was constructed from data collected from a group of 25 students. Construct a relative frequency distribution.
What proportion of the hearing loss in all the workers was attributable to not wearing earplugs?
Identify a research issue, problem, or opportunity that uses either interval or ratio level data (Recall that ratio level data are those data which have an absolute zero.
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