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1) Assume that the international average homicide victimization rate is 2.92 (per 100,000). In a sample of 24 industrialized nations, LaFree and Drass (2002) found that the mean homicide victimization rate was 1.49 (per 100,000; standard deviation = 0.44). Perform a hypothesis test to determine if the mean homicide rate in industrialized nations is different than the international average. Use a 0.05 level of statistical significance.
What is the alternative hypothesis?
2) We know that, on average, most people drive about 10 miles a day. We think that people living in Phoenix have a different average than this. We talk to 250 people that live Phoenix, and find that their average number of miles they drive per day is 15, with a standard deviation of 3.7. Conduct a hypothesis test to see if people in Phoenix drive a different amount; use a significant level of 0.05.
In a survey conducted to see how long Americans keep their cars, 2000 automobile owners were asked how long they plan to keep their present cars. The results of the survey follow. Find out the probability distribution associated with these data.
361 college students recorded the number of hours of tv they watched per week. the average is 6.504 hours with the
Where was Atlantis located, when did it exist, and how did it come to an end, according to Donnelly? What is the main historical source for Atlantis?
Casino games of pure chance? (e.g., craps,? roulette, baccarat, and? keno) always yield a? "house advantage." For? example, in the game of?double-zero roulette
A critic says, "Aha! You claim 90%, but in your sample the on-time percentage is lower than that. So the 90% claim is wrong."
While Caffarella and Barnett (2000) indicate that critique is the most influential element in helping learners produce a better writing product, critique can be an emotional event. Cameron et al. (2009) note that it proved helpful in their worksho..
Assume that previous fast-food research has shown that 80 percent of the consumers like curly french fries. The researcher wishes to have a standard error.
The mean increase is $332, and the standard deviation is $108. Give a 99% confidence interval for the mean amount of the increase. Does omitting the annual fee induce customers to charge more on their credit cards?
Think of an example of a family member or friend who has experienced intergenerational mobility. Was it upward or downward mobility? Tell us about the change.
An industrial sewing machine uses ball bearings that are targeted to have a diameter of 0.75 inch. The lower and upper specification limits.
1. graph the null hypothesis on a number line.2. determine whether the hypothesis test with the given null and
suppose the reaction time in seconds to certain stimulus is a continuous random variable x with cumulative distribution
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