Question
In: Statistics and Probability
Suppose you gather a sample size of 20 widgets and construct a 99% confidence interval for...
Suppose you gather a sample size of 20 widgets and construct a 99% confidence interval for the mean number of widgets.
Assuming this research follows approximately normal with unknown mean and variance, what would be the value of the distribution percentage point that I would use when constructing this interval?
Thanks for answering!
Solutions
orchestra answered 1 year agoRelated Solutions
Determine the sample size n needed to construct a 99% confidence interval to estimate the population...
Determine the sample size n needed to construct a 99%
confidence interval to estimate the population proportion when p
over bar equals 0.62 and the margin of error equals 7%.
n=?????
Determine the sample size n needed to construct a 99% confidence interval to estimate the population...
Determine the sample size n needed to construct a 99%
confidence interval to estimate the population proportion when p
overbar =0.68 and the margin of error equals 5%.
n=_______ (Round up to the nearest integer.)
____________________________________________________________________________________________________________________________
Determine the sample size n needed to construct a 99%
confidence interval to estimate the population mean for the
following margins of error when σ=87. a) 25 b) 40 c) 50
1) The t-value that you would use to construct a 99% confidence interval for means with a sample of size n = 17.
1) The t-value that you would use to construct a 99% confidence interval for means with a sample of size n = 17.
t valué?=
Construct a 90% confidence interval for the population standard deviation if a sample size 20 has...
Construct a 90% confidence interval for the population standard
deviation if a sample size 20 has standard deviation of 10. (a)
Find the critical value(s). (Round to three decimal places) (b)
Construct the confidence interval. (Round to three decimal places)
(c) Conclusion.
Construct a 99% confidence interval to estimate the population proportion with a sample proportion equal to...
Construct a 99% confidence interval to estimate the population
proportion with a sample proportion equal to 0.90 and a sample size
equal to 250.
------A 99% confidence interval estimates that the population
proportion is between a lower limit of ___ and an upper limit of
___.
????????
Construct a 99% confidence interval to estimate the population proportion with a sample proportion equal to...
Construct a 99% confidence interval to estimate the population
proportion with a sample proportion equal to 0.50 and a sample size
equal to 200. LOADING... Click the icon to view a portion of the
Cumulative Probabilities for the Standard Normal Distribution
table. A 99% confidence interval estimates that the population
proportion is between a lower limit of nothing and an upper limit
of nothing. (Round to three decimal places as needed.)
In a sample of 270 adults, 216 had children. Construct a 99% confidence interval for the...
In a sample of 270 adults, 216 had children. Construct a 99%
confidence interval for the true population proportion of adults
with children. Give your answers as decimals, to three places
The 99% confidence interval for the mean, calculated from a sample of size n = 10...
The 99% confidence interval for the mean, calculated from a
sample of size n = 10 is 0.9390859 ≤ μ ≤ 5.460914 . Determine the
sample mean X ¯ = (round to the first decimal place). Assuming that
the data is normally distributed, determine the sample standard
deviation s = (round to the first decimal place)
1) In a sample of 160 adults, 147 had children. Construct a 99% confidence interval for...
1) In a sample of 160 adults, 147 had children. Construct a 99%
confidence interval for the true population proportion of adults
with children.
Give your answers as decimals, to three places
< p <
2)
You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately p∗=35%p∗=35%. You would like to be 98% confident
that your esimate is within 2.5% of the true population proportion.
How large of...
What sample size would you need to make the 99% confidence interval have the same margin...
What sample size would you need to make the 99% confidence
interval have the same margin of error as the 90% confidence
interval?
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