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A simple random sample of 60 items resulted in a sample mean of 10. The population standard deviation is 15.
a. Compute the 95% confidence interval for the population mean. Round your answers to one decimal place.
b. Assume that the same sample mean was obtained from a sample of 130 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places.
In a second grade class containing 12 girls and 7 boys, 2 students are selected at random to give out the math papers. What is the probability that both are girls?
Qualitative or ethnographic research uses open-ended questions that attempt to nuance the distinctions that quantitative research attempts do to numerically.
suppose certain coins have weights that are normally distributed with a mean of 5.319 g and a standard deviation of
A random sample of 400 college students was selected and 120 of them had at least one motor vehicle accident in the previous two years. A random sample of 600 young adults not enrolled in college was selected and 150 of them had at least one motor..
Find the probability that the driver was intoxicated or the pedestrian was not intoxicated?
What is the population under consideration
what is the correlation between leadership trustworthiness and ethical stewardship? support your
Given the following data on Asian and European Share of U.S. Light Truck Sales(1990-2003): Which trend model is best, and why? If none is satisfactory, explain.
a researcher has a report for an experiment with a sample size equal to 100 the resulting 95 prediction interval was
We have discussed two different methods for making statistical inferences such as developing interval estimates and conducting hypothesis tests. These methods are the "Critical Value Method" and the "P-Value Method".
assume that the population of heights of male college students is approximately normally distributed with mean m of
Give an example of using the distributive property for a negative monomial times a trinomial with different signs on the terms [for example: -3x(2xy + 3y - 2x)] and show each step of the distribution.
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