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1. What research question(s) does the study address?
2. What is Goldberg's rationale for the study? Was the study designed to contribute to theory? Do the results of the study contribute to theory? For both questions: If so, how? If not, why not?
3. What constructs does the study address? How are they operationalized? 4. What are the independent and dependent variables in the study?
5. Name the type of design the researchers used. 6. What internal and external validity threats did the researchers address in their design? How did they address them? Are there threats they did not address? If so how does the failure to address the threats affect the researchers, interpretations of their findings? Are Goldberg's conclusions convincing? Why or why not?
Use a .05 significance level to test claims that quarters manufactured with the new equipment have weights with a standard deviation less than .061
USA today conducted a survey asking readers, "What is the most hilarious thing that has ever happened to you en route to or during a business trip? What kind of sampling method is this?
A box contains four tickets, one marked with a star and the other three blank. One draw is made from this box at random.
Probability of a flush. Poker player holds flush when all 5 cards in hand belong to same suit (clubs, diamonds, hearts, or spades).
Serum cholesterol levels were taken from a population of 10,000 college students. The results were normally distributed. Males had a mean of 195 and a standard deviation of 10.
The factorial structure of treatments. What does this plot recommend about suitability of no-interaction assumption here?
If 20 customers were selected at random during one business day, what is the probability that at least 11 of them did not order a pastry with their drink. Round answer to 4 decimal places.
Consumer Reports published an article on some sport-utility vehicles they had tested recently. They reported some basic information about each of the vehicles and the results of some tests conducted by their staff.
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
1. What do discrete random variables describe? 2. Explain joint probability. 3. Explain conditional probability.
According to the study, the mean age of a self-employed individual is 46.6 years with a standard deviation of 10.8 years.
A function sometimes associated with a continuous nonnegative random variable is the failure rate (or hazard rate) function which is defined as:
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