Consider the following probability distribution: 1 3 8. P(x) .1 .4 .4 .1 a. Find u, o, and o. Eind
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!
![ences, of course, would favor the second conclusion. Melatonin
appears to be an effective insomnia pill, one that lowers the
average time it takes the volunteers to fall asleep.
D Data Set: INSOMNIA
6.29 Consider the following probability distribution:
2
3
p(x)
.1
.4
.4
.1
a. Find u, o", and o.
b. Find the sampling distribution of x for random samples
of n
2 measurements from this distribution by listing
all possible values of x, and find the probability associ-
ated with each.
c. Use the results of part b to calculate u and o. Confirm
that ux = µ and that o = 0/Vn = 0/V2.
6.30 A random sample of n
population with a mean equal to 20 and standard deviation
equal to 16.
a. Give the mean and standard deviation of the (repeated)
sampling distribution of x.
b. Describe the shape of the sampling distribution of x.
Does your answer depend on the sample size?
c. Calculate the standard normal z-score corresponding to
64 observations is drawn from a
NW
a value of x = 16](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fef0c28d5-7b68-4c4c-876c-a0f9b605d7e3%2F8bf85964-27c2-4a14-b3fa-46a22989ecb1%2Fjqhgy9q_processed.jpeg&w=3840&q=75)
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