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A radio station must broadcast at exactly 103.1 MHz. In a random sample of 25 days they average 103.8 MHz. The SD at radio stations with similar equipment is .1 MHz. At level of significance a = .05, are they meeting FCC specifications? Do a Z-test.
Using the 0.10 level of significance, is there evidence that the population mean is above $300?
for a normal distribution that has a mean of 100 and a standard deviation of 8determine the z-score for each of the
Is there evidence to suggest that the training course helps out sales people?
a fair die is rolled 100 times. using central limit theorem estimate the probability that the sum of the faces is at
the estimate of the population proportion is to be within plus or minus .04 with a 98 percent level of confidence. the
The use of linear regression is a critical tool for a manager's decision-making ability. Please carefully read the example below and try to answer the questions in terms of the problem context.
a particular multiple regression model has 3 independent variables the sum of the squared error is 7680 and the total
The Complement rule states that the probability of an event not occurring is
a study investigated how the size of a persons dwelling was related to their ownership of motor vehicles. they found
A researcher wants to estimate the average weight loss obtained by patients at a residential weight-loss clinic during the first week of a controlled diet and exercise regimen. How large a sample is needed to estimate this mean to within 0.5 lb wi..
a medical researcher wishes to determine the percentage of females who take vitamins. he wishes to be 95 confident that
A personnel manager for a large corporation feels that there may be a relationship between absenteeism and age and would like to use the age of a worker to develop a model to predict the number of days absent during a calendar year.
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