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You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider? If convenient, use technology to construct the confidence intervals.A random sample of 44 gas grills has a mean price of $640.30. Assume the population standard deviation is $59.80.
The 90% confidence interval is ___, ___).(Round to one decimal place as needed.)
The 95% confidence interval is (____,___).(Round to one decimal place as needed.)
Which interval is wider? Choose the correct answer below.
A) The 95% confidence interval
B) The 90% confidence interval
Discuss in groups and comment on the statement that if managers learned how to conduct research by taking a course such as this there would no need to seek outside consultant help to solve their problems.
The sample mean is 12.5 pounds and the standard deviation is 9.2 pounds please compute the 95% confidence interval for the population mean.
We use the empirical rule to analyze data for samples of size 40 drawn from a population with a mean of 70 and a standard deviation of 9.
In a study of human blood types in nonhuman primates, a sample of 71 orangutans were tested and 14 were found to be blood type B. Construct a 95% confidence interval for the population proportion of blood type B in the orangutan population.
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I understand how to do a time series graph with one variable versus time in years, but I am not sure how to graph if the time is in months with more than one variable with a scatter plot.
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