| When constructing a confidence
interval for a population mean μ from a sample of size 10 ,the number of degrees of freedom for the critical value t/α2 is |
We have given,
Sample size =n=10
Degree of freedom =n-1=10-1=9
| Degree of freedom =9 |
When constructing a confidence interval for a population mean μ from a sample of size 10...
Fill in the blank with the appropriate word or phrase. When constructing a confidence interval for a population mean μ from a sample of size 12, the num ber of degrees of freedom for the critical valuer /2 is
When constructing a 95% confidence interval for a population mean μ, what is the most important condition that must be approximately satisfied so that in 95% of repeated samples the calculated intervals will cover the unknown value μ? A. The population standard deviation must always be small. B. The sample size n must be at least 100 (so that the Central Limit Theorem applies). C. The population from which the sample is drawn must be at least 10 times the...
If you are constructing a confidence interval for a population mean, for the same confidence level, the width of the confidence interval will __________ as the sample size increases. Decrease Increase Stay the same Depends on the sample size
6. Assume you want to construct a 98% confidence interval with a sample of n-10 from ofa nomally distributed population. Find the critical value ta2 (1 point) 2764 02.821 0 1.383 O3.250 7. A sample of size n - 12 does not have a known population standard deviation. The population (1 point) appears to be normally distributed. Determine whether a margin of error should be calculated using a critical value of za2, a critical value of t, or neither. a...
QUESTION 1 In constructing a 95% confidence level estimate of the mean when the population standard deviation () is known what will be your score used in the formula? QUESTION 2 In constructing a 99% confidence level estimate of the mean when the population standard deviation (a) is known what will be your score used in the formula? HINT. Be sure to review page 236 "Finding Z scores from Known Areas - Special Cases and Tabel A-2. QUESTION 3 In...
Suppose we are making a 95% confidence interval for the population mean from a sample of size 15. What number of degrees of freedom should we use? Choose the correct answer below. A. 15 B. 16 C. 14 D. There is not enough information given to find out.
Use the one-mean t-interval procedure with the sample mean, sample size, sample standard deviation, and confidence level given below to find a confidence interval for the mean of the population from which the sample was drawn. sample mean=3.0 n=41 s=5.4 confidence level=90% The 90% confidence interval about μ is ?? to ???
Answers only is okay! Construct the indicated confidence interval for the population mean μ using the t-distribution. Assume the population is normally distributed. c=0.99, x=13.1, s=3.0, n= 6 Construct the indicated confidence interval for the population mean μ using the t-distribution. Assume the population is normally distributed. c=0.95, x=14.5, s=0.55, n= 15 Use the given confidence interval to find the margin of error and the sample mean. (12.7,19.9The sample mean is In a random sample of 18 people, the mean...
Find the t critical value ta/2 to calculate a 95% confidence interval for a population mean when the sample size is 17. and the real value tar to kolesa 250w contence mentor a population meanwhen the samples Find the t critical value ta/2 to calculate a 9096 confidence interval for a population mean when the sample size is 25. 23
Use the one-mean t-interval procedure with the sample mean, sample size, sample standard deviation, and confidence level given below to find a confidence interval for the mean of the population from which the sample was drawn. x̄=4.0 n=61 s=6.1 confidence level =99% The 99% confidence interval about μ is ??? to ??? (Round to four decimal places as needed.)