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You started a new restaurant. Based on invoices for the first 30 days, you estimated your average grocery bill to be $20,000 with a standard deviation of $2000. You want to start another restaurant in a similar neighborhood and you are planning to prepare a brochure for investors and to work out a deal with a whole sale food distributor. Prepare a 95% confidence interval for the average grocery bill. Would a 99% confidence interval be narrower or wider than the 95% confidence interval?
Explain the logic of what you have done, writing as if you are speaking to someone who has never heard of correlation (but who does understand the mean, deviation scores, and hypothesis testing);
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
What is the probability that there will be more than three trucks either being loaded or waiting?
Multiple choice questions based on regression - dependent variable Y and an independent variable X is provided.
Calculate the sample mean and sample standard deviation.
Use differential calculus to find both sales volume at which revenue is maximised and the maximum revenue available from sales of product X.
Given that consumer changed te brands, what is the probability that consumer purchased fewer products than before?
The average age of the women was 36.97 with a standard deviation of 8.893. If a 95% confidence interval is calculated to estimate the difference between the two average ages, what is the margin of error? Assume both population standard deviations ..
what is the probability that the sample mean of IQ scores will not differ from the population mean by more than 2 points? (Round your answer to four decimal places.)
Determine the probability that tire wears out before 70,000 miles?
Create a 90% confidence interval for true mean amount of cholesterol in chicken eggs.
What is an example of two variables that are likely to be correlated because they are both changing over time?
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