a Random sample of n1 equals 16 communities in western Kansas gave the following information for people under 25 years of age. x1 :Rate of hayfever per 1000 population for people under 25 115 113 111 111 151 112 111 120 109 123 121 121 124 115 108 122 A random sample of n2 = 14 regions in western Kansas gave the following information for people over 50 years old. 107 107 100 99 102 105 98 81 104 104 110 97 117 97 Summer hayfever rate in each age group has an approximately normal distribution. Do these data indicate that the age group over 50 has a lower rate of a fever? What is the no hypothesis and alternate hypothesis? Is this a right tail left held or two tailed test?
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
a Random sample of n1 equals 16 communities in western Kansas gave the following information for people under 25 years of age.
x1 :Rate of hayfever per 1000 population for people under 25
115 113 111 111 151 112 111 120 109 123 121 121 124 115 108 122
A random sample of n2 = 14 regions in western Kansas gave the following information for people over 50 years old.
107 107 100 99 102 105 98 81 104 104 110 97 117 97
Summer hayfever rate in each age group has an approximately
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