A sample of 18 observations taken from a normally distributed population produced the following data: 28.5 27.4 25.4 25.2 31.4 23.4 26.4 24.2 28.5 37.2 23.9 28.5 27.5 25.2 27.1 25.1 22.4 22.7 Round your answers to three decimal places. b. Make a 99% confidence interval for μ. ( Enter your answer; confidence interval, lower bound ,Enter your answer; confidence interval, upper bound ) c. What is the margin of error of estimate for μ in part b? E= Enter your answer; margin of error
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 sample of 18 observations taken from a
28.5 | 27.4 | 25.4 | 25.2 | 31.4 | 23.4 | 26.4 | 24.2 | 28.5 |
37.2 | 23.9 | 28.5 | 27.5 | 25.2 | 27.1 | 25.1 | 22.4 | 22.7 |
Round your answers to three decimal places.
b. Make a 99% confidence interval for μ.
( Enter your answer; confidence interval, lower bound ,Enter your answer; confidence interval, upper bound )
c. What is the margin of error of estimate for μ in part b?
E= Enter your answer; margin of error
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