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A Patent Medicine Company supervisor assumes that the bottling machine is operating properly if only 5 percent of the processed bottles are not full. A random sample of 100 bottles had 7 bottles that weren't full. Using a significance level of .01, conduct a test to see if the machine is operating properly.
A random variable has a standard deviation of 16, and an unknown mean. Find the lowest size of a simple random sample so that the sample mean estimates the population mean with a standard error no larger than 0.25.
Now make a scatter plot of data from 1982 to 1998 (again, use years since 1800). Determine a linear, power, or exponential model that explains the crude oil production during this time period.
Add line-of-best fit (trend line/linear regression line) to your scatterplot. Write down the equation of the trend line below.
The world's smallest mammal is the bumblebee bat. Shown to the right are weights(in grams) from a sample of those bats. Use the traditional method and significance level of .05 to test the claim that these bats come from the same population having..
Determine the median, and the standard deviation. Determine the coefficient of skewness using Pearson's method. Listed below are the commissions earned ($000) last year by the sales representatives at the Furniture Patch, Inc.
Each year approximately 160 colleges compete in national concrete canoe competion. Each team should design a seaworthy canoe from a substance not known for its capacity to float. T
The average speed of greyhound dogs is about 18.8 meters per second. A particular greyhound breeder claims that her dogs are faster than the average greyhound. In a sample of 45 dogs, they ran, on average, 19.2 meters per second with a standard de..
What is predicted value for National Health Expenditure as a % for 2010? What is the 95% confidence interval for your estimate? Does the trend continue? Does year impact expenditure?
An investment firm with 10,000 clients would like to accurately forecast the average dollar amount their current customer will deposit over the coming year.
Determine the distributions given below represent a probability distribution. Justify your answer.
You read that statistical test at α=0.01 level has probability 0.14 of making a Type II error when specific alternative is true. Calculate the power of test against this alternative?
In a simple linear regression analysis of 18 data points the following ANOVA table was found.
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