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The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution.
1299 1243 1320 1271 1268 1316 1275 1317 1275
(a) Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to the nearest whole number.)
x = _______ A.D.
s = _______ yr
(b) Find a 90% confidence interval for the mean of all tree ring dates from this archaeological site. (Round your answers to the nearest whole number.)
lower limit _______ A.D.
upper limit ________ A.D.
Produce residual plots for the regression of given problem. Is there any apparent model inadequacy?- Run a simple linear regression of these five pairs of numbers and estimate a linear relationship between income and percentage growth in wealth.
Flatulence Case Study - Are you embarrassed by your flatus? Plot a histogram of the variable "perday." What is the range for the of the variable "perday?"
You take a random survey of 20 students and their ACT scores are: {26,22,23,12,19,25,23,21,25,10,17,26,23,24,20,14,21,23,20,22} If you know the test scores are normally distributed. What is the confidence interval at 95%?
(a) Identify the appropriate hypothesis test and explain the reasons why it is appropriate for analyzing this data.
For the data on state-dependent memory in given problem, plot the cell means using a bar graph. Compute df, MS, and F values.
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Use Chebyshev's theorem to find what percent of the values will fall between 120 and 150 for a data set with mean of 135 and standard deviation of 7.5
1.) A doctor claims that the standard deviation of systolic blood pressure is 12 mmHg. A random sample of 24 patients found a standard deviation of 14mmHg. Assume the variable is normally distributed. At a=0.01, what are the critical chi square..
a local ice cream shop sells 10000 cones of vanilla-flavored ice cream each year. the cones are ordered from an outside
Introduction to Epidemiology (401076) - University of Western Sydney - What do you think would be the major confounders that were not considered in this study
In fitting a least squares line to n = 15 data points, the following quantities were computed: SSxx = 55
Determine the sample mean, median, and mode. Give a cumulative relative frequency plot of these data.
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