Question
In: Statistics and Probability
Using Microsoft Excel functions, Suppose a simple random sample of size 45 is drawn from a...
Using Microsoft Excel functions,
Suppose a simple random sample of size 45 is drawn from a population with mean 85 and standard deviation 8.2. Answer the following:
A. What proportion of sample means would be greater than 87? P(X > 87)
B. What proportion of sample means would be between 83 and 87? P(83 < X < 87)
(round answers to nearest hundredth percent – i.e. 34.05%)
Solutions
orchestra answered 2 years agoRelated Solutions
A simple random sample of size n equals 40 is drawn from apopulation. The sample...
A simple random sample of size n equals 40 is drawn from a
population. The sample mean is found to be x overbar equals 121.3
and the sample standard deviation is found to be s equals 12.9.
Construct a 99% confidence interval for the population mean.
Upper:
Lower:
A simple random sample of size n equals 40 is drawn from a population. The sample...
A simple random sample of size n equals 40 is drawn from a
population. The sample mean is found to be x overbar equals 121.9
and the sample standard deviation is found to be s equals 12.9.
Construct a 99% confidence interval for the population mean.
Lower bound:
Upper bound:
A simple random sample of size n=40 is drawn from a population. The sample mean is...
A simple random sample of size n=40 is drawn from a population.
The sample mean is found to be x=121.7 and the sample standard
deviation is found to be s=13.3.
Construct a 99% confidence interval for the population
mean.
The lower bound is
(Round to two decimal places as needed.)
A simple random sample of size n= 40 is drawn from a population. The sample mean...
A simple random sample of size n= 40 is drawn from a population.
The sample mean is found to be x= 120.6 and the sample standard
deviation is found to be
s 13.3 Construct a 99% confidence interval for the population
mean.
A simple random sample of size n is drawn from a population that is normally distributed....
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 115, and the sample standard deviation, s, is found to be 10.
(a) Construct an 80% confidence interval about mu if the sample
size, n, is 12. (b) Construct an 80% confidence interval about mu
if the sample size, n, is 27. (c) Construct a 98% confidence
interval about mu if the sample size, n,...
A simple random sample of size n is drawn from a population that is normally distributed....
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
112, 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 26.
(b) Construct a 95% confidence interval about μ if the sample
size, n, is 17.
(c) Construct an 80% confidence interval about μ if the
sample size, n,...
A simple random sample of size n is drawn from a population that is normally distributed....
A simple random sample of size n is drawn from a population that
is normally distributed. The sample mean,
x overbarx,
is found to be
106106,
and the sample standard deviation, s, is found to be
1010.
(a) Construct
aa
9595%
confidence interval about
muμ
if the sample size, n, is
1111.
(b) Construct
aa
9595%
confidence interval about
muμ
if the sample size, n, is
2929.
(c) Construct
aa
9999%
confidence interval about
muμ
if the sample size, n,...
A simple random sample of size n is drawn from a population that is normally distributed....
A simple random sample of size n is drawn from a population that
is normally distributed. The sample mean,
x overbarx, is found to be 110, and the sample standard
deviation, s, is found to be 10.
(b) Construct a 95% confidence interval about μ if the sample
size, n, is 13.
(c) Construct a 70% confidence interval about μ if the sample
size, n, is 25.
(d) Could we have computed the confidence intervals in parts
(a)-(c) if the...
A simple random sample of size n is drawn from a population that is normally distributed....
A simple random sample of size n is drawn from a population that
is normally distributed. The sample mean,x overbarx, 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 23.
(b) Construct a 95% confidence interval about μ if the sample
size, n, is 18.
(c) Construct a 70% confidence interval about μ if the sample
size, n, is 23....
A simple random sample of size n is drawn from a population that is normally distributed....
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 106 , and the sample standard deviation, s, is found to be 10
. (a) Construct an 95 % confidence interval about mu if the
sample size, n, is 18 . The Lower Bound and Upper Bound (b)
Construct an 95 % confidence interval about mu if the sample
size, n, is 25 ....
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