Question
Using the simple random sample of weights of women from a data set, we obtain these...
Using the simple random sample of weights of women from a data set, we obtain these sample statistics: nequals40 and x overbarequals144.09 lb. Research from other sources suggests that the population of weights of women has a standard deviation given by sigmaequals32.28 lb. a. Find the best point estimate of the mean weight of all women. b. Find a 95% confidence interval estimate of the mean weight of all women. Click here to view a t distribution table. LOADING... Click here to view page 1 of the standard normal distribution table. LOADING... Click here to view page 2 of the standard normal distribution table. LOADING...
Homework Answers
Answer #1
Solution :
Given that,
Sample size = n = 40
Z
/2
= 1.96
Margin of error = E = Z/2*
(
/
n)
=1.96 * (32.28 /
40)
= 10.00
At 95% confidence interval estimate of the population mean is,
- E < 
<
+ E
144.09 - 10.00 <
< 144.09 + 10.00
134.09 <
< 154.09
(134.09 , 154.09)
Not the answer you're looking for?
Similar Questions
Using the simple random sample of weights of women from a data set, we obtain these...
Using the simple random sample of weights of women from a data
set, we obtain these sample statistics: nequals40 and x
overbarequals153.03 lb. Research from other sources suggests that
the population of weights of women has a standard deviation given
by sigmaequals30.91 lb. a. Find the best point estimate of the mean
weight of all women. b. Find a 90% confidence interval estimate of
the mean weight of all women. Click here to view a t distribution
table. LOADING... Click...
Using the simple random sample of weights of women from a data set, we obtain these...
Using the simple random sample of weights of women from a data
set, we obtain these sample statistics: n= 35 and 152.64 lb.
Research from other sources suggests that the population of weights
of women has a standard deviation 32..75 lb. a. Find the best point
estimate of the mean weight of all women. b. Find a 99% confidence
interval estimate of the mean weight of all women.
Using the simple random sample of weights of women from a data set, we obtain these...
Using the simple random sample of weights of women from a data
set, we obtain these sample statistics: n=35 and x=147.73 lb.
Research from other sources suggests that the population of weights
of women has a standard deviation given by sigma=30.06 lb.
a. Find the best point estimate of the mean weight of all
women.
b. Find a 90% confidence interval estimate of the mean weight
of all women.
Using the simple random sample of weights of women from a data set, we obtain these...
Using the simple random sample of weights of women from a data
set, we obtain these sample statistics: n equals 35 and x overbar
equals 147.88 lb. Research from other sources suggests that the
population of weights of women has a standard deviation given by
sigma equals 31.64 lb.
a. Find the best point estimate of the mean weight of all
women.
b. Find a 90% confidence interval estimate of the mean weight
of all women.
a. The best point...
Using the simple random sample of weights of women from a data? set, we obtain these...
Using the simple random sample of weights of women from a data?
set, we obtain these sample? statistics: n=45 and x over bar equals
141.67 lb. Research from other sources suggests that the population
of weights of women has a standard deviation given by sigma equals
30.84 lbs.
a. Find the best point estimate of the mean weight of all women.
b. Find a 95?% confidence interval estimate of the mean weight of
all women.
Using the simple random sample of weights of women from a data set, we obtain these...
Using the simple random sample of weights of women from a data
set, we obtain these sample statistics: n=45 and x over bar
equals=146.55 lb. Research from other sources suggests that the
population of weights of women has a standard deviation given by
sigma = 30.64lb.
a. Find the best point estimate of the mean weight of all
women.
b. Find a 90% confidence interval estimate of the mean weight
of all women.
a. The best point estimate is _____lb....
Using the simple random sample of weights of women from a data set, we obtain these...
Using the simple random sample of weights of women from a data
set, we obtain these sample statistics: n=45 and x overbar=152.29
lb. Research from other sources suggests that the population of
weights of women has a standard deviation given by sigma=32.03
lb.
The best point estimate is___
The 99% confidence interval estimate is __ lb < μ < __lb
(round to two decimals)
A data set includes 103 body temperatures of healthy adult humans having a mean of 98.3°F...
A data set includes
103
body temperatures of healthy adult humans having a mean of
98.3°F
and a standard deviation of
0.73°F.
Construct a
99%
confidence interval estimate of the mean body temperature of all
healthy humans. What does the sample suggest about the use of
98.6°F
as the mean body temperature?Click here to view a t
distribution table.
LOADING...
Click here to view page 1 of the standard normal distribution
table.
LOADING...
Click here to view page 2 of...
Suppose a simple random sample of size nequals=4444 is obtained from a population with muμequals=6767 and...
Suppose a simple random sample of size
nequals=4444
is obtained from a population with
muμequals=6767
and
sigmaσequals=1414.
(a) What must be true regarding the distribution of the
population in order to use the normal model to compute
probabilities regarding the sample mean? Assuming the normal model
can be used, describe the sampling distribution
x overbarx.
(b) Assuming the normal model can be used, determine
P(x overbarxless than<70.470.4).
(c) Assuming the normal model can be used, determine
P(x overbarxgreater than or...
12. In order to estimate the mean amount of time computer users spend on the internet...
12. In order to estimate the mean amount of time computer users
spend on the internet each month, how many computer users must be
surveyed in order to be 90% confident that your sample mean is
within 15 minutes of the population mean? Assume that the standard
deviation of the population of monthly time spent on the internet
is 211 min. What is a major obstacle to getting a good estimate of
the population mean? Use technology to find the...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 16 minutes ago
asked 16 minutes ago
asked 23 minutes ago
asked 23 minutes ago
asked 28 minutes ago
asked 32 minutes ago
asked 39 minutes ago
asked 39 minutes ago
asked 40 minutes ago
asked 48 minutes ago
asked 1 hour ago
asked 1 hour ago