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A university teacher saved every e-mail received from students in a large Introductory Statistics class during an entire term. He then counted, for each student who had sent him at least one e-mail, how many e-mails each student had sent.
a) From the histogram, would you expect the mean or the median to be larger? Explain.
b) Write a few sentences describing this distribution (shape, center, spread, unusual features).
What is the best estimate of the average obesity percentage for these countries? What is the standard deviation for the listedobesity rates?
Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
For this assignment, you will submit only the FINAL copy as there is no DRAFT option. This assignment is designed to help inform a topic that interests you, and the information you gather here will be used in your Proposal Letter assignment.
The following statements are all incorrect. Explain the statements and the errors fully using the probability rules discussed in topic two. I have flipped and unbiased coin three times and got heads, it is more likely to get tails the next time I f..
independent-samples t test with spssin your research you may find that you must compare the means of two samples
Question about Business Statistics (MA3000)? Is it possible to have a distribution that is symmetric but not normal? if so, what is an example and what would we call such a distribution?
use the one-proportion z-interval procedure to find the required confidence interval. be sure to check the conditions
A Business Week North American subscriber study collected data from a sample of 2861 subscribers. Fifty-nine percent of the respondents indicated an annual income of $75,000 or more, and 50% reported having an American Express credit card.
Nest humidity and fleas. In the setting of Exercise 28.7 (page 28-16), researchers showed that the square root of the number of adult fleas y has a quadratic relationship with the nest humidity index x. Specify the population regression model for ..
Scores on the Math Achievement Test form a normal distribution with a mean of u = 300 and a standard deviation of a = 100. What score separates the top 10% of the distribution from the rest.
a seven-year medical research study reported that women whose mothers took the drug des during pregnancy were twice as
it is estimated that 56 of the children between the ages of 3 and 5 years are already enrolled in school. in a sample
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