Recent Homework Questions About Statistics
a.( 13 +14 +17 +14 +17 +15)/6 = 90/6 = 15 b. 15 -+ 1.28 * 1.67/ sqrt(6)) = [ 14.127, 15.873] c. 15 -+ 2.33* 1.67/ sqrt(6)) = [13.411, 16.589]
Tuesday, November 12, 2013 at 2:44pm
You will need to compute the mean and standard deviation. Once you have those values, you can compute the rest using formulas. a) standard error of the mean = sd/√n Note: sd = standard deviation; n = sample size b) Margin of error = 1.96(sd/√n) Note: 1.96 ...
Tuesday, November 12, 2013 at 2:33pm
The table below shows the LOS for a sample of 11 discharged patients. Using the data in the table, calculate the mean, range, variance, and standard deviation, and then answer questions e and f. Round the variance and standard deviation to one decimal place. a. Mean b. Range ...
Monday, November 11, 2013 at 7:37pm
A state survey investigates whether the proportion of 8% for employees who commute by car to work is higher than it was five years ago. A test on employee commuting by car was done on a random sample size of 1000 and found 100 commuters by car. Test an appropriate hypothesis ...
Monday, November 11, 2013 at 6:12pm
An opinion poll asks a random sample of 100 college seniors how they view their job prospects. In all, 53 say "Good." The 95% confidence interval has a margin of error of 9.9%. The sample used actually included 130 college seniors but 30 of the seniors refused to ...
Monday, November 11, 2013 at 3:51pm
The U.S. Department of Labor and Statistics released the current unemployment rate of 5.3% for the month in the U.S. and claims the unemployment has not changed in the last two months. However, the states statistics reveal that there is a decrease in the U.S. unemployment rate...
Monday, November 11, 2013 at 2:52pm
To plan the budget for next year a college needs to estimate what impact current economic downturn might have on student requests for financial aid. Historically, this college has provided aid to 35% of its students. Officials look at a random sample of this years ...
Monday, November 11, 2013 at 2:50pm
Monday, November 11, 2013 at 12:09pm
See Previous post.
Monday, November 11, 2013 at 9:51am
Excuse me. Is .05 > P > .01? Again, we dont know.
Monday, November 11, 2013 at 9:50am
P is less than OR equal (≤) .01, which leads me to believe that taking aspirin reduces mortality.
Saturday, November 9, 2013 at 10:57pm
a) Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. Do you consider it appropriate? b) It would help if you proofread your questions ...
Saturday, November 9, 2013 at 9:57pm
Percent = mean ± ? SEm Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to one-half of the desired percentages to find the Z score and its distance from the ...
Saturday, November 9, 2013 at 9:48pm
Sunday, November 6, 2011 at 1:13pm