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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.
the mean is always the best measure of central tendency to use.truefalseif you use a simple random sample then your
Assume that each unit sold generates $70 in revenue and that each unit ordered cost $50. If the monthly order quantity is chosen to be 500 units, what is the expected monthly profit? (note: Profit=Revenue - Cost)
Last year the records of Dairy Land Inc., a convenience store chain-What is the p-value? Follow the five-step hypothesis testing procedure.
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking
suppose that the percentage annual return you obtain when you invest a dollar in gold or the stock market is dependent
estimating confidence interval for mean value of y dependent variable.consider the simple linear regression of y
What is the 99% confidence interval, if the population standard deviation is known to be 10 days? What is the 99% confidence interval, if the sample standard deviation is 10 days?
An investment project is expected to earn $100,000 on average with a standard deviation of $50,000. Assume earnings from this investment project is a normal distribution. Of the next 15 people that invest in this project, what is the probability t..
Find the probability that less than five students voted in the election and what is the probability that less than 30 accounts will be classified as delinquent?
What is the probability that a cereal would be high calorie, given that it is high fiber? In other words, what is P (high calorie, given high fiber)?
According to US Census Bureau, 7.1% of all births to non-smoking mothers are of low birth weight (
Find the sample mean for each group. Find the sample standard deviation for each group. Make a dot plot of the data sets A and B on the same line.
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