Find the 90% confidence interval for the population standard deviation given the following. n = 55, x = 11.49, s=2.34 and the distribution is normal.
We have given here,
Sample standard deviation=2.34
Sample size =55
Degree of freedom =n-1= 54
Level of significance given =1-0.90=0.1
Chi square critical value for lower tail=38.1162
Chi square critical value for upper tail=72.1532
We can use here confidence interval formula for population standard
deviation
=( 2.02, 2.79)
Lower confidence limit for population standard
deviation=2.02
Upper confidence limit for Population standard
deviation=2.79
Find the 90% confidence interval for the population standard deviation given the following. n = 55,...
7 Find the 90% confidence interval for the population standard deviation given the following (1 point n 55, -11.49,s 2.34 and the distribution is normal. 0192 <σ<3.25 o 2.09 2.92 1.37<σ< 1.01 10.28 σ< 14.32 8. Twelve different video games showing product placement were observed and the duration ( point) times of game play (in seconds) were recorded and found to have a normal distribution. The design of the study justifies the assumption that the sample can be treated as...
6. Find the 99% confidence interval for the population standard deviation given the following. (1 point) n = 17, 472,s-26.9 and the distribution is normal. 03.5 < σ< 9.1 30.0 < σ < 38.2 0322.5 < σ < 832.6 01 8.4 < σ < 47.5
Use the given data to construct a confidence interval for the population standard deviation,A) SELECT A B) Assume that the population has a normal distribution: The football coach randomly selected the following players and timed how long each player took to perform a certain drill. The times (in minutes) were: 4.1048445 < ơ < 9.8431834 2.7048445 < ơ < 9.2431834 C) D) None of These 4.1048445 < σ < 8.0431834 14,4,5,8, 11,15,10 Find a 95.0 confidence interval for the population...
Use the given data to construct a confidence interval for the population standard deviation, A SELECT ALL APPLICABLE CHOICES B) Assume that the population has a normal distribution: The football coach randomly selected the following players and timed how long each player took to perform a certain drill. The times (in minutes) were: 4.1048445 < ơ < 9.8431834 2.7048445 < σ < 9.2431834 C) D) None of These 4.1048445 < ơ < 8.0431834 [144, 5, 8,11,15,10] Find a 95.0 confidence...
Determine the 90% confidence interval estimate for the population mean of a normal distribution given n=64, 6 = 112, and x= 1,500. The 90% confidence interval for the population mean is from to (Round to two decimal places as needed. Use ascending order.)
Use the given confidence level and sample data to find a confidence interval for the population standard deviation o. Assume that a simple random sample has been selected from a population that has a normal distribution. Salaries of college professors who took a statistics course in college 99% confidence; n=51, x = $71,400, s = $17,572 Click the icon to view the table of Chi-Square critical values (Round to the nearest dollar as needed.)
Consider a 90% confidence interval for µ not known. For which sample size, n = 10 or n = 20, is the confidence interval longer? Critical Thinking Lorraine computed a confidence interval for µ based on a sample of size 41. Since she did not know α, she used s in her calculations. Lorraine used the normal distribution for the confidence interval instead of a Student's t distribution. Was her interval longer or shorter than one obtained by using an...
Use the given data to find the 95% confidence interval estimate of the population mean u. Assume that the population has a normal distribution. IQ scores of professional athletes: Sample size n = 20 Mean x = 104 Standard deviation s = 9 <μ< Note: Round your answer to 2 decimal places.
construct a confidence interval for the population standard deviation: based on the confidence interval, is it reasonable to believe that the population standard deviation is greater than 0.7 explain Mortgage rates: Following are interest rates (annual percentage rates) for a 30-year fixed rate mortgage from a sample of lenders in Macon, Georgia, on June 20, 2013. Assume that the population is approximately normal. 4.286 4.325 4.134 4.581 4.908 4.429 4.689 3.319 4.84 4.568 4.847 4.996 Send data to Excel Part:...
(1 point) Use the given data to find the 95% confidence interval estimate of the population mean p. Assume that the population has a normal distribution IQ scores of professional athletes: Sample size n = 30 Mean 2 = 104 Standard deviation s = 10