Question
In: Statistics and Probability
When calculating the 99% confidence interval for a sample of 15 patients, what constant is used...
When calculating the 99% confidence interval for a sample of 15 patients, what constant is used in the formula?
Solutions
Expert Solution
We have given confidence interval level is 99% and sample of 15 patients means n= 15
If sample values given and standard deviation is not know then we use t table
Df= degrees of freedom = n-1 = 15-1 = 14
Confidence level = C = 0.99 or 99%
tc= 2.977 (we check the d.f = 14 and C = 0.99)
When sample data is not given we have population standard deviation then we use Z table instead of t and value is
2.58 for 99%
orchestra answered 1 year agoRelated Solutions
What is the critical value t* for a 99% confidence interval when n = 20?
What is the critical value t* for a 99% confidence interval when
n = 20?
A) Given a sample of 15 and looking at a 95% confidence interval. What is the...
A) Given a sample of 15 and looking at a 95% confidence
interval. What is the right critical value ()?
B) What is the left critical value ()
A. Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 161 with 119 successes.
A. Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 161 with 119 successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. 99% C.I. = ___
B. Out of 600 people sampled, 372 preferred Candidate A. Based on this, estimate what proportion of the voting population (ππ) prefers Candidate A.Use a 90% confidence level, and give your...
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
___.
????????
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)
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
Determine the margin of error for a 99% confidence interval to estimate the population mean when...
Determine the margin of error for a 99% confidence interval to
estimate the population mean when s = 43 for the sample sizes
below. a) n=12 b) n=25 c) n=46 a) The margin of error for a
99% confidence interval when n=12 is _.
Determine the margin of error for a 99% confidence interval to estimate the population mean when...
Determine the margin of error for a 99% confidence interval to
estimate the population mean when s=45 for the sample sizes of
n=15, n=34, n=54. (Find the margin of error for each interval when
n=x)
Determine the margin of error for a confidence interval to
estimate the population mean with n=24 and s=12.3 for confidence
levels 80%, 90%, 99%.
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?
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Holly bought a 7-year bond, with a 3% coupon paid semi annually. It was priced to...
- METAR Abbreviations METAR (Meteorological Aviation Report) is a format for reporting weather information, either for pilots...
- The data below are the heights of fathers and sons (inches). There are 8 rows in...
- Without quantization procedure how much of actual information is lost during analog to digital conversion process??...
- 11. Suppose that a 32M × 16 memory built using 512K × 8 RAM chips and...
- Write a C++ program that asks the user to enter in three numbers and displays the...
- Economist Steven Landsburg argues that if one believes in the death penalty for murderers because of...
ADVERTISEMENT