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1. A study was conducted at a local college to analyze the average GPA of students graduated from Arizona State in 2012. 100 students graduated from Arizona in 2012 were randomly selected,and the average GPA for the group is 3.5. The value 3.5 is
(i) Statistic
(ii) Parameter
(iii) Cannot be determined
2. The restuarant ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) Interval
(ii) Nominal
(iii) Ordinal
(iv) Ratio
3. On the Election Day, Michigan News Club organized an exit poll in which specific polling stations were randomly selected and all voters were surveyed as they left those polling stations. This type of sampling is called:
(i) Cluster
(ii) Convenience
(iii) Systematic
the mean age at which men in the united states marry for the first time follows the normal distribution with a mean of
Suppose that we conduct a study on 10 people to test the comparability of these two methods. Data from these 10 people were obtained using both methods on each person. What is the criterion for the comparison? What is the null hypothesis? Should a..
a. If cork diameter is a normally distributed variable with mean value 3.04 cm and standard deviation .02 cm, what is the probability that a randomly selected cork will conform to specification?
Distinguish between a minimization and maximization LP model. Other than minimizing costs and maximizing profits, give a real-world example of where you would want to minimize something or maximize something.
Critically discuss some reasons that business outputs vary? For example why does production output vary? Explain the difference between common causes of variation and special causes of variation.
the grade point averages gpa for 12 randomly selected college students are shown below. assume the population is
School seniors in his random sample, 159 believe that "getting rich" is an important goal. Can he conclude, at the 0.05 level of significance, that the proportion has indeed changed?
Heights of 18-year-old men are approximately normally distributed, with mean 68 inches and standard deviation 3 inches.
How many commuters must be randomly selected to estimate the mean driving times of Chicago commuters? If we want 99% confidence that the sample mean is within 2 minutes of the population mean, and the population standard deviation is known to be 1..
Past experience indicates that an average number of 6 customers per hour stop for gasoline at a gasoline pump. What is the probability of 3 customers stopping in any hour?
research in the gaming industry showed that 10 percent of all slot machines in the united states stop working each
On the basis of previous knowledge with this type of lightbulb, the firm knows a = 30 h. How large a sample would the firm take
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