Question

Determine

mu Subscript x overbarμx

and

sigma Subscript x overbarσx

from the given parameters of the population and sample size.

muμequals=8181,

sigmaσequals=1414,

nequals=49

Answer #1

Solution :

Given that ,

mean = = 81

standard deviation = = 14

n = 49

= = 81

= / n = 14/ 49 = 2

Determine
mu Subscript x overbarμx
and
sigma Subscript x overbarσx
from the given parameters of the population and sample size.
muμequals=8686,
sigmaσequals=1818,
nequals=8181
mu Subscript x overbarμxequals=nothing
sigma Subscript x overbarσxequals=nothing

Determine
mu Subscript x overbarμx
and
sigma Subscript x overbarσx
from the given parameters of the population and sample size.
muμequals=49,
sigmaσequals=18,
nequals=27

Determine
mu Subscript x overbarμx
and
sigma Subscript x overbarσx
from the given parameters of the population and sample size.
muμequals=73,
sigmaσequals=18,
nequals=36
mu Subscript x overbarμxequals=nothing

Determine
mu Subscript x overbarμx
and
sigma Subscript x overbarσx
from the given parameters of the population and the sample size.
Round the answer to the nearest thousandth where appropriate.
u= 40
σ= 8
n=23
A. mu Subscript x overbarμx=40,
sigma Subscript x overbarσx=1.668
B. mu Subscript x overbarμx=.094,
sigma Subscript x overbarσx=.668
C.mu Subscript x overbarμx=40
sigma Subscript x overbarσx=0.348
D. mu Subscript x overbarμx=40
sigma Subscript x overbarσx=8

Determine mu Subscript x overbar and sigma Subscript x overbar
from the given parameters of the population and sample size.
muequals73, sigmaequals17, nequals23 mu Subscript x overbarequals
nothing sigma Subscript x overbarequals nothing (Round to three
decimal places as needed.)

According to an automobile association, the average cost of a
gallon of regular unleaded fuel at gas stations in a certain month
was
$2.8282.828.
Assume that the standard deviation of such costs is
$0.150.15.
Suppose that a random sample of
nequals=100
gas stations is selected from the population and the month's
cost per gallon of regular unleaded fuel is determined for each.
Consider
x overbarx,
the sample mean cost per gallon. Complete part a through
d.
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If we are sampling from a population with parameters Mu and
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2. = population st. dev
3.= population mean
4.= sample mean
5.= sample st. dev

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Both parameters unknown.
a) Give two pivotal quantities based on the sufficient
statistics and determine their distribution functions. The best
solutions are those you can use to construct confidence intervals
for Mu and sigma squared.
b) If a random sample of size 5 is observed as follows: 9.67,
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The population mean and standard deviation are given below. Find
the required probability and determine whether the given sample
mean would be considered unusual.
For a sample of
nequals=6464,
find the probability of a sample mean being less than
21.521.5
if
muμequals=2222
and
sigmaσequals=1.171.17.
LOADING...
Click the icon to view page 1 of the standard normal table.
LOADING...
Click the icon to view page 2 of the standard normal table.
For a sample of
nequals=6464,
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1, Determine μx and σx from the given parameters of the
population and sample size.
μ= 80, σ= 27, n= 81
ux =
σx =
2, A certain flight arrives on time 8080 percent of the time.
Suppose 117117 flights are randomly selected. Use the normal
approximation to the binomial to approximate the probability
that
(a) exactly 103 flights are on time.
(b) at least 103 flights are on time.
(c) fewer than 99 flights are on time.
(d) between...

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