A sample of size 47 will be drawn from a population with mean 28
and standarddeviation 6. Find the probability that x will be
greater than 29.
A)0.1423B)0.1003C)0.8729D)0.1271
A sample of size 82 will be drawn from a population with mean 24
and standard deviation 9. Would it be unusual if the sample mean
was greater than 27? Why or Why not?
A sample of size 42 will be drawn from a population with mean 52
and standard deviation 11.
(a) Is it appropriate to use the normal distribution to find
probabilities for x(bar)?
(b) If appropriate find the probability that x(bar) will be between
53 and 54. Round the answer to at least four decimal places.
(c) If appropriate find the 46th percentile of x(bar). Round the
answer to at least two decimal places.
A sample of size 75 will be drawn from a population with mean 35
and standard deviation 10.Use the Cumulative Normal Distribution
Table if needed.
1) Find the probability that mean=x will be greater than 32.
Round the final answer to at least four decimal places.
2) Find the 65th percentile of mean=x. Round the answer to at
least two decimal places.
A sample of size 34 will be drawn from a population with mean 44
and standard deviation 9.
(a) Is it appropriate to use the normal distribution to find
probabilities for x?
(b) If appropriate find the probability that x will be between 45
and 46. Round the answer to at least four decimal places.
(c) If appropriate find the 38th percentile of mean=x Round the
answer to at least two decimal places.
A sample of size 24 will be drawn from a population with mean
106 and standard deviation 34
(a) Is it appropriate to use the normal distribution to find
probabilities for x?
(b) If appropriate find the probability that x will be less than
94.
(c) If appropriate find the 95th percentile of x
.
A sample of size
23
will be drawn from a population with mean
136
and standard deviation
24
.
(a) Is it appropriate to use the normal distribution to find
probabilities for
x
?
(b) If appropriate find the probability that
x
will be less than
118
.
(c) If appropriate find the
80th
percentile of
x
.
A sample of size
23
will be drawn from a population with mean
136
and standard deviation
24
.
(a) Is it appropriate to use the normal distribution to find
probabilities for
x
?
(b) If appropriate find the probability that
x
will be less than
118
.
(c) If appropriate find the
80th
percentile of
x
.