BUAL 2650 Final Exam with Correct Answers
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Practice questions for this set
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If the random variable x is normally distributed, ______ percent of all possible
observed values of x will be within three standard deviations of the mean
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1 68.26 99.73
3 95.44 4 85.00
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Terms in this set (51)
, Suppose that a random .333
variable x has a uniform
distribution with c = 2 and
d =8. Find P(3 <= x <= 5)
Find the area under the .9772
normal curve when P(Z >
-2)
Find the area under the .1359
normal curve between P(1
< z <2)
In a manufacturing 601
process, we are interested
in measuring the average
length of a certain type of
bolt. Past data indicate
that the standard
deviation is .25 inches.
How many manufactured
bolts should be sampled
in order to make us 95
percent confident that the
sample mean bolt length
is within .02 inches of the
true mean bolt length?
Rejecting a true null Type 1
hypothesis is called a
________ error.
Save
Practice questions for this set
Learn 1 /7 Study with Learn
If the random variable x is normally distributed, ______ percent of all possible
observed values of x will be within three standard deviations of the mean
Give this one a try later!
1 68.26 99.73
3 95.44 4 85.00
Press any key to
Don't know?Continue
continue
Terms in this set (51)
, Suppose that a random .333
variable x has a uniform
distribution with c = 2 and
d =8. Find P(3 <= x <= 5)
Find the area under the .9772
normal curve when P(Z >
-2)
Find the area under the .1359
normal curve between P(1
< z <2)
In a manufacturing 601
process, we are interested
in measuring the average
length of a certain type of
bolt. Past data indicate
that the standard
deviation is .25 inches.
How many manufactured
bolts should be sampled
in order to make us 95
percent confident that the
sample mean bolt length
is within .02 inches of the
true mean bolt length?
Rejecting a true null Type 1
hypothesis is called a
________ error.
