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Question: GREEN COMPANIES In a survey conducted in 2007 of 1004 adults 18 yr and older, the following question was asked: How are American companies doing on protecting the environment compared with companies in other countries? The results are summarized below:
If an adult in the survey is selected at random, what is the probability that he or she said that American companies are equal or ahead on protecting the environment compared with companies in other countries?
Describe the concept of "conceptual framework" as related to a dissertation study. What is the conceptual framework supporting your Session Long Project "mini" study?
The underlying data are in file XR10033. Identify and interpret the p-value for the test. Using the 0.025 level of significance, what conclusion will be reached?
In a sample of 450 students from different countries, we found that the number of students in private school in that sample was 50 students.
Perform a simple linear regression analysis to predict a newborn's birth length (in inches) using the father's height as a predictor variable. Conduct your analysis using a 95% level of confidence
The study involved 205 patients who were given either a treatment consisting of a combination of folic acid, vitamin B12, and vitamin B6 or a placebo for 6 months. Explain why a placebo group was used in this experiment.
seventy percent of the bicycles sold by a certain store are mountain bikes. among 100 randomly selected bike purchases
A random sample of 20 one-way fares during particular month had a mean of $210 with a standard deviation of $43. At 0.02, is there sufficient evidence to conclude a difference from the stated mean?
As part of a research program for a new cholesterol drug, a pharmaceutical company would like to investigate the relationship between the ages and LDL (low-density lipoprotein) cholesterol of men. The accompanying data set shows the ages and LDL c..
A company is filling bags of rock salt to a level of 50 pounds. It believes that all bags are filled correctly, but would like to use a hypothesis test with an alpha of 0.05 to check this belief.
In our discussions of basic probability theory the concepts of mutually exclusive events and independent events share prominent roles. Please explain these concepts and in particular address the question
a.) What percentage of customers will receive a free oil change coupon?
In the solution to this problem, what is n? p? q? Does it appear that both np and nq are larger than 5? Why is this an important consideration?
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