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Research at a university indicates that 5 percent of the students change their major area of study after their first year in a program. A random sample of 100 students in business revealed that 48 had changed their major area of study after their first year of the program. Has there been a significant decrease in the proportion of students who change their major after the first year in this program? Choose an appropriate level of significance.
a winery owner wants to determine if one type of her wine is significantly more popular than another. she records the
What is the probablity that there are no tremors in a 1-month period? What is the probability tha there are more than 5 tremors in a 6-month period?
according to a survey of the top employers in a major city in the midwest a worker spends a average 413 minutes a day
The number of children, x, belonging to each of eight families registering for swimming was 2, 2, 2, 4, 2, 1, 2, 2. Find the mean, x. (Give answer correct to 2 decimal places.)
The mean television viewing time for teens is 3 hours per day. Assume the population mean is 3 and the population standard deviation is known to be 1.2 hours.
you notice in your introductory psychology class that more women tend to sit up front and more men in the back. to
the times for the mile run of a large group of male college students are approximately normal with mean 7.11 minutes
a a conservationist is interested in knowing whether polar bears in the wild have lower rates of reproduction than
Show that marginal cost and marginal revenue are given by? Show that the profit maximizing quantity which equates marginal revenue and marginal cost is?
If one person is selected at random from these young ones, find the probability that this person is employed given that the person is male.
Two variables in her spreadsheet, and finds r = 0.06. She decides to conclude there is no relationship between the variables. Was she correct?
Heather Carielli is a former student who earned a master degree at the Univeristy of Arkansas. When she randomly selected 16 new text books in the college book store she found that they had prices with a mean of $70.41 and a standard deviation of ..
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