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Physical Sciences
Recycling of aluminum, glass, newspapers, and magazines is good for the environment and the economy. In 2013, San Francisco had the highest recycling rate in the United States30 (recycling rate = tons collected for recycling/tons of all waste generated). Despite efforts to make the process easier, many people still do not recycle. Independent random samples of residents in Ohio and in Florida were obtained and asked whether they recycle newspapers. Of the 909 Ohio residents, 700 said they recycled newspapers, and 691 of the 923 Florida residents said they recycled newspapers.
a. Is there any evidence to suggest that the population proportion of residents in Ohio who recycle newspapers is greater than the population proportion of residents in Florida? Use a = 0.01.
b. Find the p value for this hypothesis test.
The receiver is correct only 85% of the time. What is P(W), the probability of a wrong decision if the probabilities of receiving 0s and 1s are equally likely? What can you conclude from your result?
It is important for qualitative data to be analyzed and the themes that emerge identified so that the data can be presented in a way that is understandable.
A safety engineer claims that only 40% of all workers wear safety helmets when they eat lunch at the workplace. Assuming that his claim is right, find the probability that at most 4 out of 6 workers randomly chosen will be wearing their helmets wh..
A single amoeba is in a pond. Each day, each amoeba present in the pond will die with probability p, will split into two live amoebas with probability q, and will stay alive but not split with probability 1 - p - q.
Proportion of free throw attempts that are successful. In the NBA, FT% is normally distributed with a mean of 0.721 and a standard deviation of 0.082. Which percentage of NBA players have a FT% lower than 0.784?
How many people made a purchase at exactly one of the three stores?
nicomachus defined a fifth proportion to exist whenever among three terms the middle term is to the lesser as their
A company has set a goal of developing a battery that lasts over 5 hours in continuous use in a sample of 42 of these batteries the mean life time was 306.25 hours with a standard deviation of 29.31
Assuming the distribution of the salaries is normal, what is the probability that the average for this sample is between $36,000 and $42,000?
randomly pick up 5 cards from a deck of 52 cards. find the probability that the third card is red if the first card is
Emotional exhaustion, or burnout, is a significant problem for people with careers in the field of human services. Regression analysis was used to investigate the relationship between burnout and aspects of the human services professional's jo..
A high-performance jet aircraft with an autopilot control system has a unity feedback and control system, as shown in Figure DP7.5. Sketch the root locus and select a gain K that leads to dominant poles.
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