Question

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)

Answer #1

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 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 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 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 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 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...

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...

A simple random sample of size n is drawn from a population that
is normally distributed. The sample mean, overbar x, is found to
be 115, and the sample standard deviation, s, is found to be 10.
(a) Construct a 98% confidence interval about μ if the sample
size, n, is 20. (b) Construct a 98% confidence interval about μ
if the sample size, n, is 25. (c) Construct a 99% confidence
interval about μ if the sample size, n,...

A simple random sample size of 40 is drawn from a population.
The sample mean is found to be x overbar equals 120.1x=120.1
and the sample standard deviation is found to be
s equals 12.8s=12.8.
Construct a 99% confidence interval for the population
mean.

Here are summary statistics for randomly selected weights of
newborn girls: n= 247, x overbar = 28.7 hg, s = 6.4 hg.
Construct a confidence interval estimate of the mean. Use a 95%
confidence level. Are these results very different from the
confidence interval 26.9 hg < μ < 29.3 hg with only 15
sample values, x overbar = 28.1 hg, and s = 2.2 hg?
What is the confidence interval for the population mean μ?
_ hg < μ...

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