Question

a simple random sample of size n is drawn. the sample mean, x̄, is found to be 29.5 and the sample standard deviation, s, is found to be 8.4

a) construct a 90% confidence interval for μ if the sample size, n, is 40

b) construct a 90% confidence interval for μ if the sample size n is 100

c) how does increasing the sample size affect the
margin of error, E

Answer #1

A simple random sample of size n is drawn. The sample? mean,x is
found to be 17.6 and the sample standard? deviation, s, is found to
be
4.1
(a) Construct a 95% confidence interval about ? if the sample
size, n, is 34
The confidence interval is?
(b) Construct a 95% confidence interval about ? if the sample
size, n, is 61
The confidence interval is (?,?)
(use ascending order. Round to two decimal places as needed)
How does increasing...

a simple random sample of size n is drawn. the sample mea, x, is
found to be 35.1 and the sample standard deviation, s, is found to
be 8.7.
c) construct a 98% confidence interval for u if the sample size,
n, is 40. compare the results to those obtained in part (a). how
does increasing the level of confidence affect the margin of error
E?
d) if the sample size is n=18, what conditions must be satisfied
to compute...

A simple random sample of size n is drawn from a population that
is normally distributed. The sample mean, x overbar, is found to
be 108, and the sample standard deviation, s, is found to be
10.
1. A) Construct a 96% confidence interval about μ if
the sample size, n, is 24.
1. B) Construct a 96% confidence interval about μ if
the sample size, n, is 20.
How does increasing the sample size affect the margin
of error,...

A simple random sample of size n is drawn. The sample mean, x
overbar, is found to be 17.6, and the sample standard deviation,
s, is found to be 4.1. LOADING... Click the icon to view the table
of areas under the t-distribution. (a) Construct a 95%
confidence interval about mu if the sample size, n, is 35. Lower
bound: nothing; Upper bound: nothing (Use ascending order. Round
to two decimal places as needed.) (b) Construct a 95% confidence
interval...

A simple random sample of size n is drawn. The sample mean, x
overbar, is found to be 17.7, and the sample standard deviation,
s, is found to be 4.8.
Click the icon to view the table of areas under the
t-distribution.
(a) Construct a 95% confidence interval about mu if the
sample size, n, is 35. Lower bound: nothing; Upper bound:
nothing (Use ascending order. Round to two decimal places as
needed.)
(b) Construct a 95% confidence interval about...

A simple random sample of size n is drawn. The sample mean, x
overbarx, is found to be 19.219.2, and the sample standard
deviation, s, is found to be 4.34.3. LOADING... Click the icon to
view the table of areas under the t-distribution. (a) Construct a
9595% confidence interval about muμ if the sample size, n, is
3535. Lower bound: nothingm; Upper bound: nothingm (Use
ascending order. Round to two decimal places as needed.) (b)
Construct a 9595% confidence interval...

simple random sample of size n is drawn. The
sample mean,
x overbarx,
is found to be
19.1
and the sample standard deviation, s, is found
to be
4.14
(a) Construct a
95%
confidence interval about
muμ
if the sample size, n, is
35.

A simple random sample of size n is drawn from a population that
is normally distributed. The sample mean,
x,
is found to be
115,
and the sample standard deviation, s, is found to be
10.
(a) Construct
a
95%
confidence interval about
μ
if the sample size, n, is
22.
(b) Construct
a
95%
confidence interval about
μ
if the sample size, n, is
12.
(c) Construct
a
90%
confidence interval about
μ
if the sample size, n, is...

A simple random sample of size n is drawn. The sample mean,
x overbarx,
is found to be
18.4,
and the sample standard deviation, s, is found to be
4.9
Construct a
95%
confidence interval about
muμ
if the sample size, n, is
35.
find lower and upper bounds.
Construct a
99%
confidence interval about
muμ
if the sample size, n, is 35 what is the lower and upper
bounds?

A simple random sample of size n is drawn from a population that
is normally distributed. The sample mean, x, is found to be 113,
and the sample standard deviation, s, is found to be 10.
(a) Construct a 90% confidence interval about μ if the sample
size, n, is 22.
(b) Construct a 90% confidence interval about μ if the sample
size, n, is 15.
(c) Construct an 80% confidence interval about μ if the
sample size, n, is...

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