Recent Homework Questions About Statistics
26-2.33*8/sqrt((50)), 26+ 2.33*8/sqrt((50)), = ( , ) ?
Wednesday, November 13, 2013 at 4:32pm
A company with two plants producing the same product, but with two slightly different manufacturing processes, conducted a sample study at each of the two plants with the following results: The sample statistics from the first group are: n = 40, x-bar = 18, s = 4.2. The sample...
Wednesday, November 13, 2013 at 3:32pm
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability ([1-.87]/2) and its Z score. 87% = mean ± Z(SD) Fill in the values and calculate.
Wednesday, November 13, 2013 at 10:19am
Wednesday, November 13, 2013 at 10:08am
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability ([1-.99]/2) and its Z score. 99% = mean ± Z(SEm) SEm = SD/√n
Wednesday, November 13, 2013 at 10:05am
An amusement park, Dino World, considering adding some new attractions, conducted a study over several typical days and found that, of 10,000 families entering the park, 1020 brought just one child (defined as younger than age 12), 3370 brought two children, 3510 brought three...
Wednesday, November 13, 2013 at 9:07am
3 statistics professors and 7 chemistry professors are available to be advisors.If each professor has an equal chance of being selected, what is the probability that both professors are cgemistry professors?
Wednesday, November 13, 2013 at 8:52am
How could you say this is nonsense. This is a question of health statistics Do not be rude if you are helping someone. If I were you I would say I do not know this question instead of saying it nonsense.
Tuesday, November 12, 2013 at 9:43pm
The average gasoline price of one of the major oil companies has been $3.20 per gallon. Because of cost reduction measures, it is believed that there has been a significant reduction in the average price. In order to test this belief, we randomly selected a sample of 36 of the...
Tuesday, November 12, 2013 at 8:44pm
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
e) LOS = 29 for one of the patients. This would be considered an outlier. f) Perhaps a better measure of central tendency would be the median.
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