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A company is testing a machine that produces balls. A sample of 27 balls has (for the diameters) a sample mean of 3.5025 inches and sample standard deviation of 0.01 inches.
Find a 99% confidence interval for the mean diameter of the produced ball.
The number of viewers of American Idol has a mean of 33 million with a standard deviation of 10 million. What is the probability that next week's show will: Have between 37 and 44 million viewers?
Denote the Bergen County population mean as µ1 and the Morris County population mean as µ2. Using a significance level of your choice, carry out a hypothesis test for H0: µ1 ≥ µ2.
Given the following data from two independent samples, conduct a one-tailed hypothesis test to determine if the first sample mean is larger than the second sample mean, given a 0.05 level of significance.
Entrepreneurship researchers are interested in the relationship between entrepreneurial behaviour of firms, such as innovation or new business venturing, and performance indicators, such as sales growth or profitability.
If measurements are made over span of 9 months, and results are averaged, find out the probability that neighbourhood is considered unsafe?
Among 200 randomly selected dvd of this type suppose u have to find the probability x is less than 8 which distribution does this have?
Calculate a 90% CI for the population proportion of Americans who believe there is intelligent life on other planets.
A bowl contains 16 chips, of which 6 are red, 7 are white, and 3 are blue. If four chips are taken at random and without replacement, find the probability that: there is at least one chip of each color.
Standard deviation of this poll is 4%. What would be standard deviation if sample size were increased from 83 to 190?
Identify the sample and population. Also, determine whether the sample is likely to be representative of the population.
1-state whetherbeach othe following true or false and explain whya a high negative correlation value for example p-.95
Create the spreadsheet simulation. Use 500 simulation trials to reply the question: What is the mean profit for the simulation?
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