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Question: Ancient air The composition of the earth's atmosphere may have changed over time. To try to discover the nature of the atmosphere long ago, we can examine the gas in bubbles inside ancient amber. Amber is tree resin that has hardened and been trapped in rocks. The gas in bubbles within amber should be a sample of the atmosphere at the time the amber was formed. Measurements on 9 specimens of amber from the late Cretaceous era (75 to 95 million years ago) give these percents of nitrogen:
63.4 65.0 64.4 63.3 54.8 64.5 60.8 49.1 51.0
Explain why we should not carry out a one-sample t test in this setting.
Then apply regression analysis in which the percentage change in the trade balance is the dependent variable and the percentage change in the exchange rate is the independent variable. Is there a significant relationship between the two variables?..
Suppose that a claim is made that the average billionaire is 60 years old or younger.The following is a random sample of billionaires. Conduct the test using the 0.05 level of significance.
What is the approximate permutation test P-value and What is the permutation test P-value for testing the equality of the means versus the hypothesis that the mean change for the treatment group is larger than the mean treatment for the control gro..
Calculate the upper bound for a 95% one-sided confidence interval estimate for the rate of noncompliance.
An airline maintenance base wants to make a change in its overhaul operation. The present situation is that only one airplane can be repaired at a time, and the expected repair time is 36 hours, whereas the expected time between arrivals is 45 hou..
a team of psychologists studying narcolepsy a sleep disorder characterized by sudden nodding off during the day decided
Problem 1: Use the given graph to find the mean, median, and mode of the distribution.
A real estate agent needs to estimate the average value of a residential property of a given size in a certain area.
Based on a survey conducted on the DietSmart.com web site, investigators concluded that women who regu- larly watched Oprah were only one-seventh as likely to crave fattening foods as those who watched other daytime talk shows (San Luis Obispo Tr..
Think of any other situation where choices involve multiple objectives. Create a fundamental-objectives hierarchy and a means-objectives network.
consider the following linear programming problemmaximize 10x 12ysubject to3y 2x ? 3603y 4x ? 480x y ? 0what is the
a box contains four tickets labeled 0136. the chance that the sample sum of the labels on the tickets in three
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