Test a hypothesis
Explain what a critical value is, and explain how it is used to test a hypothesis?
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The average counting rate of a radioactive sample is around 486 cpm. Determine the probability that in any given 10 second interval one gets less than 72 counts. Is this similar as the probability of getting less than 72 x 6 = 432 counts in about
When radioactive substance provides a counting rate of around 1250 cpm at time t = 0, and a counting rate of 475 cpm at time t = 20 minutes, determine the half life of the substance.
The 8 high-capacity rats had mean blood pressure 89 with standard deviation 9; the 8 low-capacity rats had mean blood pressure 105 with standard deviation 13. (Blood pressure is measured in millimeters of mercury.)
(i) Determine the magnetic deflection force which acts on the proton in the chamber? The proton mass is around1.67*10^-27kg. (ii) Determine the radius of the path of proton?
The Stars in a typical globular cluster orbit at speeds of around 10 km/s, and stars at the outskirts of a globular cluster are around 50 light-years from the center.
What assumption must hold to make statistical inferences about a population variance?
Assume that a random sample of nine measurements from a normally distributed population gives a sample mean of (xbar = 2.57) and a sample standard deviation of s=.3. Use critical values to test H0:u=3 versus Ha:u?3 using levels of significance a=.
Find the value of the linear correlation, r. Round to the nearest thousandth.
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