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Suppose you attend a school that offers both traditional courses and online courses. You want to know the average age of all the students. You walk around campus asking those students that you meet how old they are. Would this result in an unbiased sample?
kilgallen inc. has the total inventory of 1000. currently kilgallen has this entire inventory stored in one warehouse.
400 people are chosen from a large population that is 50% women. How likely is it that the sample has only 180 women or fewer? What is the value of the test statistic z?
the grains composing polycrystalline metals tend to have weights that follow a log-normal distribution. for a type of
Suppose that scores on a particular test are normally distributed with a mean of 130 and a standard deviation of 19. What is the minimum score needed to be in the top 5% of the scores on the test?
when analysis of data reveals a difference between levels of a factor what is this called?a. factor effectb. level
There are different types of forecasting models that can be used in business research. Each model is suitable for a type of historical demand data. Some data may have a trend, may be without a trend, or may be seasonal.
Explain these results to a person who has never had a course in statistics - An experiment is conducted in which 60 participants each fill out a personality test,
the national freshman-to-sophmore retention rate has held steady at 74. a certain college has 483 of 607 freshman
when the variances of the population distribution and the sampling distribution of means are compared thea. variences
1.students at university x must be in one of the class ranks freshman sophomore junior or senior. at university x 35 of
An LU professor is interested in whether there is a difference between undergraduate students and graduate students in the amount of time spent praying each day.
a. Construct a bar chart that effectively displays these data. b. Construct a pie chart to display these data.
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