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Researchers can run t-tests on which type of variables?
A) A group variable and continuous variable
B Two criterian variables
C) The dichotomous variables
D) An active variable and a correlational variable
The table below lists the number of audience impressions (in hundreds of millions) listening to songs and the corresponding numbers of albums sold (in hundreds of thousands).
The mean is 75 and the standard deviation is 6. If 1200 students took the test, approx how many students would be expected to score between 69 and 81?
Name six virtues and characteristics of problems and hypothesis. Name some tips for identifying and developing formal research problems.
Provide an example and explain. Why do statisticians play only a limited role in deciding whether statistical significance requires a business action?
during the last energy crisis a government official claimed that the average car owner refilled the tank when there was
Find a 90% confidence interval for the mean amount left by all groups.
A random sample of 50 men, 40% said they preferred walking up stairs than taking the elevator. In a random sample of 40 women
What if the number of debilitating network viruses detected in a day at the firewalls of an Internet service provider within a certain geographic region is fueling a possible management decision to upgrade the detection system.
an exit poll of 1000 randomly selected voters found that 515 favored candidate a. is the race too close to call? answer
The specification that true average penetration be at most 50 mils. They will be used unless it can be demonstrated conclusively that the specification has not been met. What would you conclude?
questionthis assignment has 4 parts.nbsp save part one as hw5version2.xls then save parts 2 to 4 in a different file
He wants to be 95% confident that his estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within $200?
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